Hello @brs-sebascova !
You’re very welcome, and thank you for your reply! Yes, I’m aware that the engine is still quite new, but it’s frustrating that I was able to upgrade to 5.5.4 without issues, yet I can’t do the same with 5.6. As you suggested, I tried with a clean cache and even attempted merging into a fresh 5.6 project—but no luck. I’m still getting the exact same error.
From what I can tell, the blueprints causing the crash are somehow related to Sequencer. What’s even stranger is that I still get the error even if I completely clear out the blueprint’s content—unless I delete the blueprint entirely.
If I remove the pre-defined maps from the config and let the engine load into an empty level, I can open the project. However, I can’t even rename the problematic blueprints—let alone open them. As soon as I try, the same error appears again and causes a crash.
I really hope this gets fixed with a hotfix 