But now I was viewing every form I have in this account, and sometimes I get the same problem, but after a couple of seconds I can view the data again.
I think maybe the number of submission could be a problem, I have forms with 31831, 55106 and 13 submissions
Could you also please kindly let us know on when you get this error message (if possible we would appreciate if you could provide us the exact steps you did) so that we could dig deep into your issue. In addition, also please let us know the server you are using. This should be helpful.