Hi Scarabaeus,

Very interesting considering your issue looks like mine : 

NB : you post is not complete, a part of your text is missing, maybe because you tried to insert error messages in text which is not working in the form (I have had the same issue when I posted mine), so try to insert screenshots of your error messages.

Looking forward to reading contributions of the community :)

Yes i cant post anything without error.

I have yr solution but i cant post the code. 

Find the www.conf file of phppfm 8.1 and add a listen Line to the adresse yu have in yr log then restart the service or server.

Can yu tell me if yu have the timezone error with a fresh installation ? It the next step for yu via tt je web installation process. 

I think i will reinstall my server from scratch because i cant post here without error

Thank you.
I tried to modify www.conf but it doesn’t change anything.
I have NO time zone error.

I am moving forward with the solution suggested in my post by luciole26 :

I had that timezone error you comment here. I have to say that from upgrade there are BIG issues of Centreon Debian 11, they should fix this as soon as possible.

See this topic: Changing Central IP - http conf location | Community (centreon.com)