I had the same problem yesterday with MODMYI, my repos were working fine for months untill yesterday. I removed modmyi to fix the problem.First thing is, you have too many packages on Cydia. You need to delete 3rd party repos until you no longer get that message. Start there. After the error message goes away, then try adding ModMyi. That might be the issue. If it still doesn't work there are a couple other things you can do to get it back. But start by deleting repos to resolve that error first.