Hello there @WavierSole_1722!
That error has showed up in other threads accross the community, its usually tied to invalid or missing data. There are a few approaches to resolution:
- Clear your project by deleting folders Saved, Intermediate, and DerivedDataCache
- Check for any redirectors in your folders using “Fix Up Redirectors”
- Re-validate your files by going to Tools > Asset Actions > Reload / Recompile All Blueprints
- Move your assets to a clean project, to check if the issue persists there