Now, perhaps you could also try this version:
https://drive.google.com/file/d/1acdWkRdB8R0aPCOtRWVEW2xB3nPXa6oz/view?usp=sharing
with MariaDB Java Client 3.0.8?
You will need to replace mariadb-java-client.jar in the addons directory with this:
https://repo1.maven.org/maven2/org/mariadb/jdbc/mariadb-java-client/3.0.8/mariadb-java-client-3.0.8.jar
It would be nice to test compatibility with the newer version now that you’re at it, since the previous version is more than six years old.