“Image data does not exist. Please re-upload the image.”

I’ve been wrestling with this problems for days –

Every time I upload an image (thumbnail image) for my header area at:

https://www.justinwallacephotography.com/

The wp gallery gives me the message:

“Image data does not exist. Please re-upload the image.”

I have to try uploading the image dozens and dozens of times before it will eventually work.

This error only occurs at certain size ratios for some reason. I can’t imagine where a problems like this could originate. I’ve been searching for a solution online for some time now, but still can’t come up with an answer.

Please let me know if you all know anything that may be able to help.

Should I downgrade to the last version of wp?

– Justin