Follow these simple steps to fix the issue:
- Select the agent that presents the issue by clicking on it from the list of protected machines to the left of the core UI
- From the Summary page, expand the protected volumes by clicking on the black arrow to the left of the grouped protected volumes
- Click on the menu action button to the far right of the affected volume
- From the Protection Schedule Menu uncheck the schedule days and then hit Apply to accept changes and close the window

5. Relaunch the same menu and check on once again the schedule days and hit Apply
6. Hit the Refresh button at the top of the Summary page to refresh metadata and agent info
7. Force a snapshot