I can't submit a new mod

I tried to submit a mod, but it said “inappropriate content detected”.

What kind of files can they induce this error?

I didn’t do anything that is strange to my mod. It’s just simply a custom campaign. I’ve submitted several campaigns already here, but it’s my first time of seeing that error even though I did the same way as always.

Oh, I fixed it. I have no idea why it happened, but I canceled 4 out of 5 images on the upload page, and it worked then. The four images were just screenshots that haven’t been problematic.