Over last couple of weeks whenever I tried generating a report, it failed with attached message. Error shows after about a minute since report generation started. Last successfuly generated report was on Jan 18.

 

Any ideas? Is it just me or the problem is universal?

It just started working again by itself a couple of weeks later.

Mine don't work, it did for a while then stopped with the same message you had. 

Mine stopped now again. I have no idea what makes it (not) work.