Your driver URL is more likely to be something like

driver.url=jdbc:db2://%endpoint%[:%port%][/%database%]

so that the endpoint, port and database fields can be filled in from TPL. The system is complaining about the lack of %endpoint%

Make sure you don't have spaces in the driver.class line.

The other thing you will need is the DB2 licence jar (which I believe is called db2jcc_licence_cu.jar)

It will log to $TIDEWAY/log/tw_integrations-ui.log though I doubt that will tell you anything as all it will try to do is load the class.

What is the name of the properties file?

Where did you put the jars?

I imagine the problem is that the system fails to load db2jcc_licence_cu.jar

Try putting only this jar file in /usr/tideway/java/integrations/lib and restarting the services.

Note: This is not supported and may break in the future.