[RCD] Can't load mails and addressbook in 1.2-git anymore

Since yesterday evening, I can't load any mails and the addressbook anymore in 1.2-git [GIT 20160110.1602]. Flags such as read/unread are still set, though.

After attempting to load a mail, RC doesn't react anymore (can't even logout). After a reload of the page, it does react again, but still doesn't load mails.

The log is telling this:

[10-Jan-2016 21:57:17 Europe/Berlin] PHP Fatal error: Can't use function return value in write context in /kunden/394333_40476/webseiten/webmail-beta/program/lib/Roundcube/rcube_addressbook.php on line 553 [... and 20 or so times more till I gave up ...]

Any idea? As the -git is my production environment, a soon help would be appreciated.

Cheers,

Michael Heydekamp Co-Admin freexp.de Düsseldorf/Germany