Webmailsite blank after update to Plesk 12.0.18 unr 80

Hello,

i have a big problem as you have read in the topline.

while opening webmail.mydomaine.com, the site is blank.

the apache log says:
"
PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/cgi/conf.d/imap.ini on line 1 in Unknown on line 0
PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/cgi/conf.d/mcrypt.ini on line 1 in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mcrypt.so' -...

Webmailsite blank after update to Plesk 12.0.18 unr 80