Virtuemart 4, Joomla 4 error: "500 - behavior::modal not found"

59 Posts

souacz posted this 03 January 2023

Joomla 4, Virtuemart 4, Themler 559, PHP 8.1

After entering the product category, I get the error: "500 - behavior::modal not found".

On the standard Joomla template it's ok, the problem is only in the template generated by Themler. Themler editor site has the same error when tried to edit category template.

Downgrading the php version to 7.4 does not solve the problem (I mention this because you advised a user with a similar problem)

Please intervene urgently.

Joomla 4, Virtuemart 4, Themler 559, PHP 8.1 After entering the product category, I get the error: "500 - behavior::modal not found". On the standard Joomla template it's ok, the problem is only in the template generated by Themler. Themler editor site has the same error when tried to edit category template. Downgrading the php version to 7.4 does not solve the problem (I mention this because you advised a user with a similar problem) Please intervene urgently.

joomla-4 joomla-4.4 virtuemart-4

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25 Comments

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39 Posts

SkarletRivpiz posted this 09 August 2025

In Hong Kong web projects, we’ve used DeepSeek V3 code search to locate every instance of JHtml::_('behavior.modal') in Themler templates and replace them with Joomla 4-compatible modal initializations. Might help here too.

In Hong Kong web projects, we’ve used [DeepSeek V3][1] code search to locate every instance of JHtml::_('behavior.modal') in Themler templates and replace them with Joomla 4-compatible modal initializations. Might help here too. [1]: https://www.deepseek-apk.com

39 Posts

SkarletRivpiz posted this 09 August 2025

For Hong Kong-based Virtuemart communities, we sometimes coordinate bug-fixing sessions via نسخة الويب من واتساب, so developers can live-share browser console logs while testing on different templates.

For Hong Kong-based Virtuemart communities, we sometimes coordinate bug-fixing sessions via [نسخة الويب من واتساب,][1] so developers can live-share browser console logs while testing on different templates. [1]: https://www.whathesapp-web.com

39 Posts

SkarletRivpiz posted this 09 August 2025

Some Joomla meetups here also troubleshoot template override issues together, and we’ve used Versi Web WhatsApp chats to keep track of fixes, especially when comparing results between PHP 8.1 and 7.4 environments.

Some Joomla meetups here also troubleshoot template override issues together, and we’ve used [Versi Web WhatsApp][1] chats to keep track of fixes, especially when comparing results between PHP 8.1 and 7.4 environments. [1]: https://www.whatlsapp-web.com

10 Posts

suzyiulee2024 posted this 29 August 2025

The 2D run-and-jump platform game stickman boost ! 2 incorporates aspects of parkour. More emotions, move explosions, stunts, and levels!

The 2D run-and-jump platform game [stickman boost](https://stickmanboost.com/) ! 2 incorporates aspects of parkour. More emotions, move explosions, stunts, and levels!

2 Posts

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