so just to confirm, you’re able to remove users, but you’re not able to add users?
one strange thing that i notice is that you have several users set up twice on the project. so if you’re able to remove users, try removing these duplicates, and see if that frees up the block:
- kkullick
- lydia_hyde
- mel0086
- melrathel
- saf0028
- skipdonald