title says it all, heres my crash report https://pastebin.com/44K1h0Gr

alright, ill check that out.

I'll have to look into this, it's crashing on this line from the Ultimate Plane Mod https://github.com/henkelmax/ultimate-plane-mod/blob/1.16.5/src/main/java/de/maxhenkel/plane/events/CapabilityEvents.java#L22

I suspect you'll be able to work around this by turning on forceGuiFallback in the client config for Hats.

it works! thank you.