I built a new system (Fedora 32, MediaWiki 1.34.2, PHP 7.4.9, Apache 2.4.43, MySQL 8.0.21) and was able to export/import the database fine. Ran setup, detected and updated existing tables successfully and got the wiki up and running fine. However, when trying to login as the wikiadmin account I created, it throws up and not sure where to begin troubleshooting...
A database query error has occurred. This may indicate a bug in the software.
[XzB3VDLGJynTV@x3fS54RQAAAEI] 2020-08-09 22:23:16: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"