Issue running reports

I would be running reports no problem and the all of a sudden I get this error and then I can’t run reports any more. Does anyone have any idea why?

some times if I wait a while, then I can run reports again. This can become quite annoying.

Is SSRS configured in each of your appservers? I found out in a support call that if you have EVER configured SSRS on an appserver, even if it no longer has a task agent checking for print jobs it needs to still have SSRS configured.

Do you have the magic number of three task agents recommended? Do you have a background appserver running the three task agents handling printing and processing?

What is you Max Concurrent tasks set to? I doubled the default of 20 from the same support call.

Where do I check what the max concurrent tasks is set to?