Wilson, I think they've re-rebroken it...
I no longer get the "value cannot be null" instant response, now I can't log on at all, just like when I first tried PGO and unknowingly had two-factor turned on. It's been off since then and no other changes have been made to my Yahoo account. I can lot into Yahoo using the same credentials that were stored as my Master Account info, but now I can't get any connection via PGO using the same user name and password (copy and pasted to avoid any possibility of error). No "List", no "Refresh", no nothin!
I'll watch the forum for possible answers. I guess the good news is we get some extra time to hate on Verizon/Yahoo.
Rhetorical question: could they possibly have screwed this up any worse?
Bob