Can't post photos??

Hi hi! So im trying to make a post with pictures are I cant?? Where the "ok" button is, there is also a "text button". I cannot get my pictures into the video because the "text" button is in the way. I can't slide down or press the x without losing the images.

Does anyone know how to fix this??? Im trying to make a post before June 1st for art fight. I've reopened the app and tried over and over again, restarted my phone, checked for updates, NOTHING.

Thanks Reddit