Do you have multi-media messaging enabled?
Good afternoon @usern5VmMjdOgY
Are you still experiencing this error? Lets try clearing the cache and data on the Gallery application. Go to Settings>Apps>Gallery, then tap Storage. The options to clear the cache and data are there. Then test the app to see if you can send those pictures from the Gallery.
had the same prob. all of a sudden no pictures i took showed up in gallery. turns out that the sd card was bad. take it out and see if that solves the prob. it solved mine.
Just checking back in to see if multi-media messaging is enabled?