Thank you for the fast reply, and that fix it. ?That error looks related to this:
Importing the Input integration causes 153 compilation errors
Hi, I have worked with UCC 2.3.5 and Unity LTS version 2020.3.17f1 for a while and it has always worked correctly, no matter what UCC integration I have tried to use on it. I always work with the URP pipeline (I don't think it is important in this case, but I figured I mention it.) I also use...opsive.com
If you add the Unity.InputSystem assembly to the Opsive/Shared Assembly Definition it'll fix the error. This will also be in the next update.