It looks like you have Java 12 (or above) installed (or code compiled on this version), but Mendix runs on Java 11.
Moving your development environment down to Java 11 will fix this.
Hope this helps.
The error claims the SQLserver library version you are using was compiled with Java 12. So your runtime Java must be 12 or newer.
Or get a different version of SQL server library.
I am attaching the user lib and version screen shot, kindly have a look , thanks in advance