Are both domains on the same server? Enable debug mode and maximum error reporting in Joomla global configuration then retry to see if it outputs any more information with the error. Looks like a query is trying to set a datetime column to empty string, which is indeed not valid. If no further information is output please contact your host and see if you've access to the database error log and can provide the full error as it would be helpful to see the full query that's erroring.

I am unable to confirm in local clean install tests so it's possibly a MariaDB database configuration problem. I do not have MariaDB setup at this time, but can test that version next week to see if there's a problem specifically with MariaDB.