unable to initiate campaign run due to the number of running batch data flow
We are trying to run a campaign in 8.4.4 , the campaign is not running. It remains in scheduled state and after sometime it gets failed with the below error.
"Unable to initiate campaign run due to number of running batch data flows."
I checked in agent queues, nothing is present in broken queues. PFA the screenshot.
All required agents are up and running.
Distribution test is working.
Please suggest how to debug the issue.