[solved] After upgrade to 1.3 "Preferences -> User Interface" hangs

[m0urs]

After upgrade to 1.3 I cannot use "Preferences -> User Interface" anymore. Any other preferences are working but for this one I only get a "Loading" message and the following errors in the Browser console:

URL:

https://server.acme.com/?_task=settings&_action=edit-prefs&_section=general&_framed=1

Status:
500
Internal Server Error

Any idea / hint?

Thanks,
Michael

[alec]

Check the error log, likely caused by some external plugin.

[m0urs]

Right, just wanted to add that I see the following error:

PHP Fatal error:  Call to undefined function Q() in /var/www/webmail.urspringer.de/html/plugins/converse/converse.php on line 270

[m0urs]

As I no longer use the XMPP integration, I just dosabled that plugin. And everything works now again. Thank you.