Upgrade from Debian 10 to Debian 11 Apache PHP mismatch

Thanks again, I had already read and done all these configurations, but I read and reread everything you told me again, and I redid it again, and now it worked, things from the beyond.

If you can help me with one more point, I would be grateful.

I started with version ISPConfig 3.1 and had SSL through Certbolt and with the updates and lack of experience I ended up installing acme.sh.

Now both are on the server, and I have some problems with email SSL configurations.

The current SSL configuration is here in this post https://www.howtoforge.com/securing...server-with-a-valid-lets-encrypt-certificate/

I would like help to remove Cetbolt correctly without causing damage. And try to solve my problems with SSL.
Thanks