Mod_wsgi cannot be load after restore on new Server

Hello all,

I have a new server (Ubuntu 20.04 the old was Debian 10) for the 2.0 version set up. Now I have moved the PROD site to the new server with omd backup / restore and tried to start there under the 1.6.22 again unfortunately comes an error when starting the Apache:
Cannot load /omd/sites/main2/lib/apache/modules/ into server: cannot open shared object file: No such file or directory

The file is located in the specified directory and I even set it to 777 to rule out a legal problem.

Does anyone have another idea ???

When I create a new site it runs without problems.

Greetings Bernd

could it be an permission issue between CMK - Apache ???