Testing the connection to an AWS RDS hosted Mariadb database fails with:
SYS-E-HTTPFAIL, No MySQL ODBC Unicode Driver version x.x or above is installed.. SYS,GENERAL_EXCEPTION, No MySQL ODBC Unicode Driver version x.x or above is installed.
Resolution
Verify that the Qlik Replicate documentation was followed correctly and that the /etc/odbcinst.ini file contains an entry for MySQL. See Driver prerequisites | Qlik Replicate Help.
If a new driver was installed, it may have overwritten a previous entry or wrongly added a new one.