Ok.
Try the steps in this order:
1) In GUI choose Resource Groups : Highlight the RG and choose Suspend Resource Group
2) Recreate RG with the same policy and schedule
3) Restart the scheduler service (see Additional Information in kb below)
Caution: Do not delete the RG if you want to keep the snapshots on the primary volume(s) as deleting it will also remove these snapshots.
Steps covered in this kb: