"You must upload an iMessage screenshot" error = Unable to Submit for Review

I am seeing the following errors and I don't know how to fix it. I have taken screenshots from within the simulator for each size below. How can I resolve this?

Unable to Submit for Review

The items below are required to start the review process: You must upload an iMessage screenshot for 6.5-inch iPhone displays. You must upload an iMessage screenshot for 12.9-inch iPad Pro (2nd Generation) displays. You must upload an iMessage screenshot for 12.9-inch iPad Pro (3rd Generation) displays. You must upload an iMessage screenshot for 5.5-inch iPhone displays.

In App Store Connect, there is a section "iMessage App" where you can upload iMessage screenshots. This is separate from the main "App Previews and Screenshots" section. If you're viewing in Media Manager, there is also a section for iMessage App screenshots.

"You must upload an iMessage screenshot" error = Unable to Submit for Review
 
 
Q