Error - Buyers love large photos that clearly show the item, so please upload high-resolution photos that are at least 500 pixels on the longest side

[KevinT 0]

Since last night, when attempting to list any products I am receiving this message:

Error - Buyers love large photos that clearly show the item, so please upload high-resolution photos that are at least 500 pixels on the longest side

All the images are at least 1000 pixels on the shortest side, I previously had the items listed with no issues.  Everything was fine earlier in the day then a couple hours later the error started.

[Hanna 0]

Looks like the images don't meet eBay's requirements.
The first thing I would verify is that pictures are at least 500 pixels on the longest side (that is one of eBay's recommendations).
You may find this guide helpful https://www.ebay.com/help/selling/listings/adding-pictures-listings?id=4148, eBay describes the requirements for photos here. I hope this helps