I have the same problem. I have the copyright to the photo as I took them myself. I converted the photo to a JPEG so it would not be too large. But every time I try to pin my own photo XHR returned response code 503 is returned. Pity there appears to be nobody who has any connection with Pinterest who can explain a work around. Reading some of the other posts it seems if I tried to upload the same photo but from a different location the same problem would occur.
I have the same problem. I have the copyright to the photo as I took them myself. I converted the photo to a JPEG so it would not be too large. But every time I try to pin my own photo XHR returned response code 503 is returned. Pity there appears to be nobody who has any connection with Pinterest who can explain a work around. Reading some of the other posts it seems if I tried to upload the same photo but from a different location the same problem would occur.