You will need to go to  Print/Efile 1099 for NEC and continue to the Map Vendor Payment Accounts.  They all defaulted back to "Omit payment from 1099"  Remap your accounts.  Be sure to Save and Close  Then you should be able to proceed as you normally do.

Also when you look at your 1099 Summary report make sure the last box on the 1099 Option line is toggled to NEC - it always defaults to MISC

Hope this helps