The following warning:
Warning
We recommend that you properly fill in all the fields. Do you want to continue without correcting these warnings?
It is recommended that you fill in some categories for your uploads.
offers two buttons, "Cancel" and "OK". I don't know which button does what. I think, "OK", means, "Yes, continue", but maybe it means, "OK, let me fill in some categories"? Buttons like this should offer obvious, unambiguous, answers to the question being asked.