My iPad will not permit new photo upload

Hi.
I just joined warmshowers as a host a few days ago. I uploaded a pic of myself, then deleted it, with the intention of loading another existing photo. Now, when I try to click on file to choose a pick, my screen goes black and I'm booted off warmshowers. I was successful once, and I know is doing it correctly, does anyone know why my iPad is doing this? I want people to be able to see me!
Thanks, Maya