These visa and required doc online glitches, which prevent successfully OLCI sometimes, is a twist of the knife when combined with the global change to 60 minutes advance checkin rule.
I had a problem olci from PVG last week said my details were invalid and couldn't OLCI, but I got through it. solution: try again, and again. It worked randomly the third time.
First time, no. No change to anything (same device, same browser, same information entered), second time also no. third time no change to anything once again, yes success. I dutifully arrived at PVG 50 minutes before departure.