Themler is nog working on Joomla! 3.9.2 The hotfix https://answers.themler.io/articles/173620/how-to-fix-the-error-after-updating-to-joomla-3-9 didn't solve my problem. After hitting the button 'Edit...

i can't install a theme in joomla 3.9.2

We have updated our site to Joomla 3.9.2 but we cannot use themler anymore. In Extensions / Template --> we choose the default theme - we try edit the theme but we receive a big blank and no more...