This item can't be accessed because the listing has been deleted, or you're not the seller

This error normally appears if you try to relist/revise item which had been stopped more than 60 days ago. (eBay removes all items from its system after 60 days because of non-activity).  So you should use "list" action to make an item active on eBay first.

Another reason of this - if you changed eBay account in the Listing (i.e. item was listed with one eBay account, then you change account and try to perform activity using another eBay account)

 

eBay Integration