Hi,
I have set off J5 compatibility plugin then Jevents administrator CRASH due "Class JToolBar not found" error.
JToolBar has been suppressed in Joomla 4+. To fix it, you have to replace for example :
$bar = JToolBar::getInstance('toolbar');
to
use Joomla\CMS\Toolbar\Toolbar;
$bar = Toolbar::getInstance('toolbar');
in all "com_jevents" files.
I've attached modified "com_jevents" file : "com_jevents_3.6.85_JToolBar_fix.zip"
which fix JToolBar error in administrator backend.
Could you please fix this "JToolBar" class error in main JEvents branch source
Best regards,
Gil