Got "Response code 413 from server" message when in old puzzle 1572 and when trying to share old or new solutions with self or group in 1572b

BUT it still shows up in the new puzzle so edited this message...
Won't let me share with group though. Will try resave and share.
Nope, won't share resave from previous. Will try working it and sharing again.
Nope still get the error message