WebP conversion failing

That means the token/nonce used to validate that you’re an admin is expired. Logout, and log back in and see if that helps.

No it is still doing the same thing. I’ve even logged in on a different machine. My annual subscription has just been repaid a couple of days ago. (this is for the cloud version).

Actually, I don’t even know how the webp images got there. I’ve never had the option to create them turned on. Is it safe to delete them? They are taking up space on my server.

Actually they all seem to have arrived in a 3 week period between late august and mid september 2014. I’ve discovered it is safe to remove them, so you can close the ticket.