Roundcube / webmail stops working

[Ryrzy]

Hi,
After todays update PHP on my server (5.5.33-1~dotdeb+7.1) my webmail stops working. Webmail page is not opening. I have restarted apache server but no luck, stil not working. Any ideas ? maybe upgrade of roundcube like here -> viewtopic.php?f=12&t=5381&start=10#p36957 will work ?

thanks