Problem: SharePoint Online Term store gave an error, “An unexpected error has occurred. Please try again later.” when trying to populate the term store with new term store groups/term sets/terms.
Solution: Add Term Store Administrator
Add your account under the term store Admins! Here is how:
- Login to SharePoint Admin center >> Expand “Content services” and click on “Term store”.
- Select the “Taxonomy” home node >> Click on the “Edit” link under the Term store “Admins”.
- Add your account as Term store Administrator!