ok so take the photo leave it in the phone library
come to rollitup , go to the thread
upload a file , choose file, (if nothing happens) click close
and repeat
upload a file, choose file, close
upload a file, choose file, close
eventually once you hit upload a file, choose a file your photo library will pop up , and you can choose the photo from the actual photo library itself, and it will take a few minutes to upload
for whatever reason some samsung android devices are being picky
your problem seems to be that youre trying to upload a picture while taking a photo, so take the photo PRIOR to uploading , dont use the "take a photo or video" option use the "photo library" option.