Overlay editing not working

1- Version: 6.2.6
2- System: Windows 10
3- Account: Basic

5- Describe the bug: I’m trying to add some HFX stuff on my overlay, but after editing and pressing save it gives a “overlays.notification.save-error”. I even tried to make a new Overlay, but saving it without any layers gives the same error notification.

Also when trying to close the Overlay editor, it prompts the “Exit without saving?” and when pressing yes, nothing happens. I have to close Lumiastream from task manager