Did that and got “1” in the box, “4” in the box then finally “There was a problem with the request”.
Error message wasn’t “Try After some time” it was “There was a problem”. The very last option.
Could it have anything to do with that I’m using it where the URL is name.com/test/blog vs name.com
I was having the same problem. I figured out that if I upload the image as usual (with the requested file size), right next to “Insert into post” is “Use as thumbnail”. It started working after that. I was trying to use “Set as thumbnail” vs “Use”. Made the difference between working and not working.
