SUHOSIN - Use of preg_replace() with /e modifier is forbidden by configuration

[Toffmonster]

Today my forum suddenly stopped working with the following error:

Fatal error: SUHOSIN - Use of preg_replace() with /e modifier is forbidden by configuration in...

I didn't change anything, and my php version is v2, everything was working until today.
Could you, please, look into the issue?

Thank you in advance.

Edit:
It's working again now. Thank you.