Why can't I import my TD Ameritrade 1099B

All seems to be good, until I enter my 11 digit Document Number.  I keep getting the 'Following fields have limits' icon that reminds me to enter only 11 digits with no spaces. So I can't import.  I've also tried entering fewer digits to see what happens, and still get the same icon.  What gives?

I've never had a problem in prior years...