Can't edit or add photo to my listing

Sorry to read you are having trouble editing via the App,

 

What happens when you attempt to Edit fields - Are you getting any error messages?

 

This could be dependable on what you have Listed that you are attempting to Edit - Different Listing Types have different allowable Editing Fields, whether bids have been made & the Reserve has been met and some Listings can only be Edited through the Desktop site. - Refer to the Help section Editing a live listing to determine what, when & how you are able to Edit your Listing for your particular item.

 

If you should be able to Edit your Listing via the App ensure you are running the latest up to date App version - If Yes! then try after clearing your Cookies & Cache - Cheers.