Data Refresh action cannot be completed because the maximum amount of concurrent Data Refresh actions is currently being processed by the server11 / 10

Dears,

I have been facing this issue from two days, I have set schedules for 5 webi reports to be refreshed after a certain period of time, it was working fine, But now all jobs are getting failed and not even a manual refresh of document is success.

Please tell me where this issue can be resolved at CMC level.

BR,

Hassan