iTunes category error

Validating the RSS feed I get

ERROR: No category selected. Your feed should have at least one itunes:category tag so that users can easily find your podcast.
X WARNING: No itunes:explicit tag in feed. This should be included so that Apple Podcasts can put a parental advisory warning on your podcast’s listing if necessary.

Even though I have set all itunes categories, old and new, in the feed settings.
What is the problem? I am using the linked validator inside Powerpress.

I have tried and triple checked several times.