Unable to mark order as Complete

[ShriRudram]

Unable to mark order as Complete since last 3 days.

Tried all ways like  Cleaning cache and cookies,

Changed Browser , Used Incognito mode . But everytime it is showing Error :

Hmm. Something went wrong. Try refreshing, but if this persists contact support.

PLease help me 

[CryzalisDesigns]

Other sellers have been having the same issue, you will need to contact Etsy and report the glitch

[ShrijiCraftsArt]

etsy also not resolving the issue and sending different email.