"Cannot process highlighted contacting surfaces"

Sorry, man, but you have black model with black edges. There is still 0 visibility on the problematic region. try changin model color to white/light gray. take a screenshot without first part than without the other. Describe problematic region in text and include simulation features applied to them. What kind of interface you are using. Most of the time those are tangential surfaces. But can't prove it from those screenshots.