By “We”, do you mean the client machines?
It’s the dedicated server which needs to have TLS 1.2 access to access the FLS backend.
Another thing you can try is to open the “resource monitor” (task manager → performance → “open resource monitor” at the bottom) and check if you have processes that are doing heavy cpu, memory or disk operations - a common culprit are things like antivirus deciding to scan files that get written)
There was two patches released since yesterday, did you see any change?