Edit - POTENTIAL SOLUTION: Select the live assist button (top-right icon that looks like a person with a speech bubble). Decline the plus offering and it'll take you to the help search menu. Search for 1099-NEC. Tap the link that appears at the top of the results to immediately jump to it. Check to see if, as in my case, there is a duplicate entry of your 1099-NEC that is in fact missing info. Delete said duplicate. You'll be able to continue and successfully file.
I'm having this exact same problem right now and it's preventing me from filing. None of the other comments have proven helpful as they point to either paying for live help or contain dead links.
