Latest WordPress 5.3 Update Causing Themler Themes to break

gmmcreative
20 Posts
gmmcreative posted this 13 November 2019

I went install a themler theme to one of my demo sites for a client to customize, and got a whole mess of errors. Called my hosting company and they said it is a result of the latest WordPress 5.3 update causing themes to break. They said that the themler theme is not compatible with the latest wordpress update. Who else is having their themes break as a result of this latest wordpress update?

I went install a themler theme to one of my demo sites for a client to customize, and got a whole mess of errors. Called my hosting company and they said it is a result of the latest WordPress 5.3 update causing themes to break. They said that the themler theme is not compatible with the latest wordpress update. Who else is having their themes break as a result of this latest wordpress update?
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gmmcreative
20 Posts
gmmcreative posted this 13 November 2019

These are the errors that i am getting as a result of the 5.3 update. Themler, please make this compatible with this update.

Warning: Declaration of WP_Export_Theme_Installer_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php on line 8

Warning: Declaration of WP_Export_Upgrader_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php on line 39

Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-includes/functions.php on line 5946

Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-admin/includes/misc.php on line 1252

Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-admin/admin-header.php on line 9

Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-includes/option.php on line 958

Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-includes/option.php on line 959

These are the errors that i am getting as a result of the 5.3 update. Themler, please make this compatible with this update. Warning: Declaration of WP_Export_Theme_Installer_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php on line 8 Warning: Declaration of WP_Export_Upgrader_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php on line 39 Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-includes/functions.php on line 5946 Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-admin/includes/misc.php on line 1252 Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-admin/admin-header.php on line 9 Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-includes/option.php on line 958 Warning: Cannot modify header information - headers already sent by (output started at /home2/gmmcreative/public_html/demo/virtualoffice/wp-content/themes/drjcprmiami/export/CoreUpdateHelper.php:8) in /home2/gmmcreative/public_html/demo/virtualoffice/wp-includes/option.php on line 959
copywriter
82 Posts
copywriter posted this 13 November 2019

I have the same problem ... what about it?

I have the same problem ... what about it?
f.keckes
7 Posts
f.keckes posted this 13 November 2019

I have the same problem in WP 5.3:

"Warning: Declaration of WP_Export_Installer_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /nfsmnt/hosting2_2/8/5/85ce95be-7844-4b6b-bab5-e2cb97079374/agrispecial.sk/web/wp-content/themes/Agrispecial/export/export.php on line 1009"

export.php line 1009 is:
"class WP_Export_Installer_Skin extends Theme_Installer_Skin {"

What is the problem?

**I have the same problem in WP 5.3:** "Warning: Declaration of WP_Export_Installer_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /nfsmnt/hosting2_2/8/5/85ce95be-7844-4b6b-bab5-e2cb97079374/agrispecial.sk/web/wp-content/themes/Agrispecial/export/export.php on line 1009" **export.php line 1009 is:** "class WP_Export_Installer_Skin extends Theme_Installer_Skin {" **What is the problem?**

Last edited 13 November 2019 by f.keckes

engels
54 Posts
engels posted this 13 November 2019

Yes, equal issues here. WP 5.3. was okay, but upgrading to 5.4 this morning gives the following 2 warnings:

Warning: Declaration of WP_Export_Upgrader_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /var/www/vhosts/webundprint24.de/httpdocs/webundprint24_website_shop/wp-content/themes/wp24/export/CoreUpdateHelper.php on line 8

Warning: Declaration of WP_Export_Upgrader_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /var/www/vhosts/webundprint24.de/httpdocs/webundprint24_website_shop/wp-content/themes/wp24/export/CoreUpdateHelper.php on line 39

But theme seems not to be broken.

Yes, equal issues here. WP 5.3. was okay, but upgrading to 5.4 this morning gives the following 2 warnings: Warning: Declaration of WP_Export_Upgrader_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /var/www/vhosts/webundprint24.de/httpdocs/webundprint24_website_shop/wp-content/themes/wp24/export/CoreUpdateHelper.php on line 8 Warning: Declaration of WP_Export_Upgrader_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /var/www/vhosts/webundprint24.de/httpdocs/webundprint24_website_shop/wp-content/themes/wp24/export/CoreUpdateHelper.php on line 39 But theme seems not to be broken.
gmmcreative
20 Posts
gmmcreative posted this 13 November 2019

Did anybody else report this to themler to fix it? Or, am i the only one. My hosting company said they were inundated with calls saying that their themes had broken as a result of this update. Themler needs to fix this.

Did anybody else report this to themler to fix it? Or, am i the only one. My hosting company said they were inundated with calls saying that their themes had broken as a result of this update. Themler needs to fix this.
Support Team
Support Team posted this 13 November 2019

Hello,

We are sorry for the issue. It should be fixed soon and we will let you know when the fix is available.

Sincerely,
Nettie

Hello, We are sorry for the issue. It should be fixed soon and we will let you know when the fix is available. Sincerely, Nettie
Support Team
Support Team posted this 15 November 2019

Hello,

The update is available now. Please follow the suggestion from this topic:
https://answers.themler.io/questions/193781/themler-v493-beta-compatibility-with-wordpress-5-3

Sincerely,
Nettie

Hello, The update is available now. Please follow the suggestion from this topic: https://answers.themler.io/questions/193781/themler-v493-beta-compatibility-with-wordpress-5-3 Sincerely, Nettie
aureliamaeve639394
1 Posts
aureliamaeve639394 posted this 04 April 2025

I actually faced this same problem after updating to WordPress 5.3—my Themler-based theme completely broke, and layouts were all over the place. I came to this forum hoping to find help, and after some trial and error, I ended up downgrading for a while just to keep my site wormszoneapks.com running.

I actually faced this same problem after updating to WordPress 5.3—my Themler-based theme completely broke, and layouts were all over the place. I came to this forum hoping to find help, and after some trial and error, I ended up downgrading for a while just to keep my site [wormszoneapks.com][1] running. [1]: https://wormszoneapks.com/
jennikim266
2 Posts
jennikim266 posted this 05 April 2025

I need to understand the possible reasons why a WordPress update would break a theme. WordPress updates can sometimes introduce changes to core functions, deprecated functions curve rush game, or changes in how certain features are handled. Themler is a theme builder, so maybe the way it generates themes relies on functions that have been modified or removed in 5.3.

I need to understand the possible reasons why a WordPress update would break a theme. WordPress updates can sometimes introduce changes to core functions, deprecated functions [curve rush game][1], or changes in how certain features are handled. Themler is a theme builder, so maybe the way it generates themes relies on functions that have been modified or removed in 5.3. [1]: https://curverush.com
beautifulpuzzle88
1 Posts
beautifulpuzzle88 posted this 4 weeks ago

You're definitely not alone. I also ran into compatibility issues after updating to WordPress 5.3, especially with older or less-maintained themes like Themler. It seems the update changed how certain functions and scripts are handled, which is causing widespread breakage in themes that aren’t regularly updated. On my project beautiful puzzle games, looking for a workaround, rolling back to an earlier version or testing with a staging site might help.

You're definitely not alone. I also ran into compatibility issues after updating to WordPress 5.3, especially with older or less-maintained themes like Themler. It seems the update changed how certain functions and scripts are handled, which is causing widespread breakage in themes that aren’t regularly updated. On my project [beautiful puzzle](https://beautifulpuzzle.com) games, looking for a workaround, rolling back to an earlier version or testing with a staging site might help.
fabulaxstyle
1 Posts
fabulaxstyle posted this 1 weeks ago

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KFC UK's menu offers a variety of options, including Sharing Buckets, Box Meals, Burgers, Vegan options, Twister Wraps, Riceboxes & Salads, Chicken Sides, Classic Sides & Dips, Cookies, a selection of Drinks, and Kids Buckets. For a comprehensive look at their offerings, you can browse their full menu online. https://royalmenu.co.uk/kfc-menu/
castlesapkk
2 Posts
castlesapkk posted this 6 days ago

Yeah, I've run into similar issues after updating to WordPress 5.3 some of my older themes started throwing layout and function errors. It looks like a lot of legacy-coded themes haven't been updated to match the new standards. In the meantime, I've been focusing on client tools outside of WordPress to avoid downtime like using media apps for content demos. If you're taking a break from debugging, check out Castle APK. it’s a solid app for streaming movies. Just make sure to get it from a safe source.

Yeah, I've run into similar issues after updating to WordPress 5.3 some of my older themes started throwing layout and function errors. It looks like a lot of legacy-coded themes haven't been updated to match the new standards. In the meantime, I've been focusing on client tools outside of WordPress to avoid downtime like using media apps for content demos. If you're taking a break from debugging, [check out Castle APK][1]. it’s a solid app for [streaming movies][2]. Just make sure to get it from a safe source. [1]: https://castleappp.org/ [2]: https://castleappp.info/
castlesapkk
2 Posts
castlesapkk posted this 6 days ago

Totally feel your pain—WordPress updates sometimes break more than they fix, especially when themes or plugins aren't well-maintained. I've been dealing with theme conflicts too and needed a break from the chaos. While troubleshooting, I’ve been using Spotify Premium APK to stream music without ads—makes the debugging process a bit more bearable 😅. Worth checking out if you're into music while you work—just be cautious about where you download spotify premium from. and book your service of pest control in islamabad and rawalpindi

Totally feel your pain—WordPress updates sometimes break more than they fix, especially when themes or plugins aren't well-maintained. I've been dealing with theme conflicts too and needed a break from the chaos. While troubleshooting, I’ve been using Spotify Premium APK to stream music without ads—makes the debugging process a bit more bearable 😅. Worth checking out if you're into music while you work—just be cautious about where you [download spotify premium][1] from. and book your [service of pest control in islamabad][2] and rawalpindi [1]: https://spotipremium.com.mx/ [2]: https://cleanhouse.pk/pest-control-services-in-islamabad-rawalpindi
ellysehix
7 Posts
ellysehix posted this 5 hours ago

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I'm an academic consultant with experience helping students tackle tough subjects. If you're struggling with tax laws, returns, or calculations, I offer detailed [Taxation Assignment Help][1] tailored to your course needs. I also provide general [Homework Help][2] across various subjects to make learning a bit less overwhelming. Feel free to reach out if you need some guidance or last-minute support [1]: https://au1.globalassignmenthelp.com.au/taxation-assignment-help [2]: https://au1.globalassignmenthelp.com.au/
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