Several of the good lock modules need to be updated for One UI V3.0. There's a few that currently support it, but not all of them. It was the same situation last year when One UI V2.0 arrived. You may have to wait until the new year for full support.
Please perform the clear cache of the Goodlock app and check if it works.
Go to Settings> Apps> Select Goodlock app> Tap on Storage> Click on Clear cache.
If the problem persists, please share the screenshots of the app error.
Some of the good lock modules need to be updated, but there is no update available yet.
It's likely that we will need to wait until the new year for the updates.
I totally agree with you, they should have updated all necessary software before roll out the new Android OS.