I am running Ubuntu 22.04 and CQRlog 2.5.2, both new installs. When I open CQRlog, the small picture appears as expected, but after a few (10?) seconds, an error popup is displayed. The error is:
Error during connection to database: TMySQL57Connection : Server connect failed.

Then the "Database Problem" window from CQRlog appears, and suggests the FAQ (which did not help) and the urging to send you the final lines of the mysql.err file.

I look forward to your comments.
Thanks,
Joe n0now

2023-06-26 16:24:16 0 [Note] Starting MariaDB 10.6.12-MariaDB-0ubuntu0.22.04.1 source revision as process 18883
2023-06-26 16:24:17 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2023-06-26 16:24:17 0 [Note] InnoDB: Number of pools: 1
2023-06-26 16:24:17 0 [Note] InnoDB: Using generic crc32 instructions
2023-06-26 16:24:17 0 [Note] InnoDB: Using liburing
2023-06-26 16:24:17 0 [Note] InnoDB: Initializing buffer pool, total size = 83886080, chunk size = 83886080
2023-06-26 16:24:17 0 [Note] InnoDB: Completed initialization of buffer pool
2023-06-26 16:24:17 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=6019440,6019440
2023-06-26 16:24:17 0 [ERROR] InnoDB: Missing FILE_CHECKPOINT at 6019440 between the checkpoint 6019440 and the end 6028857.
2023-06-26 16:24:17 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2023-06-26 16:24:17 0 [Note] InnoDB: Starting shutdown...
2023-06-26 16:24:17 0 [ERROR] Plugin 'InnoDB' init function returned error.
2023-06-26 16:24:17 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2023-06-26 16:24:17 0 [Note] Plugin 'FEEDBACK' is disabled.
2023-06-26 16:24:17 0 [ERROR] Unknown/unsupported storage engine: innodb
2023-06-26 16:24:17 0 [ERROR] Aborting