In my case I also upgraded miners yesterday.

MNs were ok but controller wallet was stuck at 122999 like capulo's. I resynced and now it's ok

biblepay-cli getblockhash 123010
ad6f362c94ff32ebd0875a1686529fb21e5bbb15ab5afc93c8af7310b32bdcc3

capulo, for

error: Could not locate RPC credentials...

Shut down biblepayd, check that you have latest version (not 1.2.0.1), then launch again. I detected that some 1.2.0.1 daemons are not shutting down in a timely manner, so they don't allow new 1.4.3.1 to start. In extreme case you may need a sudo kill -9 PID