On a firmware v2.92, I couldn't connect to VRM portal, because /data/db/vrmlogger-backlog.sqlite3 was corrupted, and vrmlogger doesn't seem able to detect and correct it. Deleting the faulty file solves the issue, but there ought to be a way to recover without a root SSH access :-)
A backtrace to help pinpoint where it goes South:
@4000000064d0bf9230351a44 main()
@4000000064d0bf9230353984 File "/opt/victronenergy/vrmlogger/vrmlogger.py", line 681, in main
@4000000064d0bf92305c841c start_logging(state)
@4000000064d0bf92305d91a4 File "/opt/victronenergy/vrmlogger/vrmlogger.py", line 440, in start_logging
@4000000064d0bf9230773424 endpoint.send(VrmCommandType.ANNOUNCE, get_announce())
@4000000064d0bf92307812cc File "/opt/victronenergy/vrmlogger/http_endpoint.py", line 494, in send
@4000000064d0bf9230950cc4 self._put_in_buffer_with_fallback_on_internal(data, int(time.time()))
@4000000064d0bf92309602dc File "/opt/victronenergy/vrmlogger/http_endpoint.py", line 449, in _put_in_buffer_with_fallback_on_internal
@4000000064d0bf9230b0ed7c self._active_buffer.put(data, timestamp)
@4000000064d0bf9230b1c83c File "/opt/victronenergy/vrmlogger/nonvolatilequeueramdiskwrapper.py", line 58, in put
@4000000064d0bf9230bae05c return super(NonVolatileQueueRamDiskWrapper, self).put(data, timestamp)
@4000000064d0bf9230bbf1cc File "/opt/victronenergy/vrmlogger/nonvolatilequeue.py", line 186, in put
@4000000064d0bf9230cae204 cursor.execute("DELETE FROM queue WHERE timestamp < (strftime('%s', 'now') - ?)", (self._max_age,))
@4000000064d0bf9230cbeba4 sqlite3.DatabaseError: database disk image is malformed
