Can't save old decks

when i try to edit an old deck and click submit it stays stuck on submitting and says there's an error. 

Can't say I am able to replicate it and our logs have no errors server side for this from what I can see. Can you give me a small step by step on what you are doing?

If you are on desktop on a PC, you could also press F12 to open web browser dev tools, click console and see does an error show there when you attempt to update.

Thanks!