Datapoint:
I'm not point-sharing from my account, but still got the "Oops, something went wrong"-message in whatever OS, browser, browsing-mode or network I used.
Found this thread, installed Tampermonkey, installed the SK Claim Missing Points-script, and was able to retroclaim points from a CI China Airlines flight from 15th of November. It posted instantly.
Amazing reverse-engineering from tr3k and ChocolateFactory! Contributions like yours adds tenfolds in value to this forum!