When i try starting a session it says it found disallowed object type, any ideas?

[TGH]

I found a temp solution to this. Go in the outiliner and select the object incriminated, then details and then find the “disallowed property” in my case it was a material. Click on the “reset” arrow. You’ll notice that nothing will change because it’ll re-apply the same thing but… somehow it fixed it for me.