I'm working on replacing my hamshack machine with one a bit more capable. I have CQRLog running on the old box, and am quite happy with it.

installed a fresh copy of Mint 20 on the new box. I've used the synaptic tool to remove MariaDB and install MySQL per some of the other entries that I've found on these forums.

Upon launching CQRLog, I get the splash screen, then:
Error during connection to database
TMySQL57Connection: Server connect failed.

Per the next dialog, I am posting the last several lines of my mysql.err file

>>
2020-11-15T05:06:20.814952Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.22-0ubuntu0.20.04.2) starting as process 5672
2020-11-15T05:06:20.815612Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2020-11-15T05:06:20.815621Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2020-11-15T05:06:20.824140Z 1 [ERROR] [MY-011011] [Server] Failed to find valid data directory.
2020-11-15T05:06:20.824280Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2020-11-15T05:06:20.824329Z 0 [ERROR] [MY-010119] [Server] Aborting
2020-11-15T05:06:20.824598Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22-0ubuntu0.20.04.2) (Ubuntu).
2020-11-16T00:12:33.824604Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.22-0ubuntu0.20.04.2) starting as process 1634
2020-11-16T00:12:33.825634Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2020-11-16T00:12:33.825643Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2020-11-16T00:12:33.833507Z 1 [ERROR] [MY-011011] [Server] Failed to find valid data directory.
2020-11-16T00:12:33.833645Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2020-11-16T00:12:33.833709Z 0 [ERROR] [MY-010119] [Server] Aborting
2020-11-16T00:12:33.833996Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22-0ubuntu0.20.04.2) (Ubuntu).

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Thanks in advance,
de Dan, AF7O