@asheroto Did you actually read my question? Which version of FOG do you use?
From the logs it looks like you use 1.5.9 which is the last official version. Yes, this version does not work with Debian 11 because it was released months befor Debian 11 came out! We have fixed this issue in the so called dev-branch version weeks ago. For further details read these topics:
https://forums.fogproject.org/topic/15370/dev-branch-1-5-9-79-installing-package-php-gettext-failed-has-to-use-x-switch-to-get-it-to-work https://github.com/FOGProject/fogproject/issues/433 https://github.com/FOGProject/fogproject/pull/428 https://github.com/FOGProject/fogproject/issues/429