Joomla 4 - 500 behavior::modal not found.

Hi,
I upgraded a website from Joomla 3.10.0 to Joomla 4 yesterday (on our development server) and the site had eventbooking installed.
After the upgrade eventbooking was still working but now I found out that I can't edit or create events with this error: 500 behavior::modal not found.
Beside eventbooking the site has only the theme-extension installed.

Do you have an idea what could be wrong?

Greetings, Martin
 

Hello Thomas

In Events Booking current version, there are two editor-xtds plugin which I forgot to check with Joomla 4:

- Events Booking Event Detail
- Events Booking Registration Form

These plugins are rarely used, and I completely forgot about it. For now, go to Extensions -> Plugins, disable the two plugins and the error will be gone. I will address this issue in next release of the extension

Regards,

Tuan

Hi Tuan,
I checked it and both plugins are not activated but I found out that the plugin Events Booking Stip EasyImage was activated and caused the error. After deactivating it the error was gone.

Greetings, Martin

Ah, OK. That was a plugin which is used to integrate with a third party plugin. It should be updated, too

Regards,

Tuan