The error indicates that the MariaDB upgrade process ran into an unspecified error. However, since that error is outside QIE itself we'll need to look at the MariaDB logs to try and discover why.
Note that MariaDB 11.4 is the newest supported version for QIE. The current version of QIE requires MariaDB 10.7 - 11.4, so your current database (being version 10.7.3) should be sufficient to upgrade to the latest QIE release. If QIE is unable to upgrade, there may be a QIE startup argument that is set incorrectly.
In either case, if you contact support directly, we can schedule a call to look at your system. Support can be reached via email at support@qvera.com, or via phone at 801-335-5101 extension 2.