I can't upgrade IPS because this error: "Database Check - There are some problems with your database which need to be fixed before you can start the upgrade."

When I click in "fix automatically" button nothing happens and I can't advance for step 2.

I am currently using v4.5.4 and PHP v8.1

Without actually knowing which database problems occur it's not very likely you can get an advice here. As I haven't experienced such a message I don't know where to look for a more detailed message. Perhaps it's in the error logs in your ACP.

Was there another option besides “fix automatically”? If so, that’s probably the route you need to take.