May be you got some conflict either in project folder or in .scss file.
Please try to resolve it manually. Then synchronize app directory and clean deployment directory.
Hope this will help.
you can try with sign out from one drive, with one drive it will create the issue. one drive create instance of project which is not allowing to commit the changes.
Try sign out from one drive→ synchronize directory → clean project deployment directory.
hope it helps!!
The issue is with One Drive.
It’s moving files that Studio Pro is trying to use so you are seeing a conflict.
Can you move your Mendix application out of One Drive? If you can’t, can you disable syncing while you are using Studio Pro?