While publishing my posts, I have came across following error on my wordpress blog.
Error message is – “Scheduling failed. Sorry, you are not allowed to assign the provided terms”.

Fix:
- Click on “Save draft” to save your post.
- Try to re-edit your post
- Publish
It will fix the error and your post will be published or scheduled. I could not figure out what is causing the error, but the above fix worked for me.