Cannot save listing

[BrookiesBazaar]

I'm trying to add a new listing to my shop but despite trying alternative browsers and alternativeways of structuring the listing it errors every time that I attempt to save, preview, or publish. The error message is:-

There was a problem saving your changes. Contact Etsy SupportOpens a new tab and make sure to include this error code in your message:
Error code: Eu etc....

I have logged it as a support request but in the meantime I am unable to list 

[ArtDollsbyJD]

Did you try cleaning out cache and cookies?  Rebooting?

[WitticismsRus]

I'm having a similar issue with just a few listings. I can't make any edits to them at all. I just needed to mark 1 variation as out of stock but it just won't accept any edits. I did all the suggested cache clearing, rebooting, trying other browsers, deactivating and reactivating etc. Nothing helped or fixed the issue. It's random and only happening to 3 or 4 of them so far. I spent way too long with live chat yesterday and they have no idea. They apparently bumped it up the chain and I'm still waiting for a reply.  I had to deactivate them since I can't edit the variations and mark 1 of them out of stock.