The turning mechanism between the earpad and the headband broke.
After almost one and half year my headphones just broke when I wanted to put them on. I was very surprised that this happened and I'm also very sad because I can't even wear them anymore. The sound and everything is just fine.
Floortje B the only way you can fix that is by either having someone 3D print you a new part for it or you’ll find another pair that is broken other than the hinge part. Looks like the 2 screws are the only thing that hold those to your headphone. Removing those most likely enables you to replace the broken part.