overnight 'error in configd communication Traceback'

[dinguz]

On one system I get this error every night. I don't have any cron jobs scheduled for this time, so I don't really know where to start investigating this. System is up-to-date and running 21.1.5. Any hints?

2021-05-20T03:02:21   configctl[83611]   error in configd communication Traceback (most recent call last): File "/usr/local/opnsense/service/configd_ctl.py", line 68, in exec_config_cmd line = sock.recv(65536).decode() socket.timeout: timed out   
2021-05-20T03:02:00   configctl[95510]   error in configd communication Traceback (most recent call last): File "/usr/local/opnsense/service/configd_ctl.py", line 68, in exec_config_cmd line = sock.recv(65536).decode() socket.timeout: timed out