Hi John,
May have it figured out..............image is too large, the developers created an error message that is incomprehensible to mere mortals, but makes complete sense to them.
I tried to add it to my album using the "browse" feature, I got no error, it just didn't upload.
I tried uploading it with the "drag & drop" feature - ditto, no error, no upload.

I resized it to 800x600 & it loaded with both drag & drop and browse.

I'll have more info after this test.