Activity feed problem

Hi,

My site is having an issue I cannot seem to resolve. None of my members or I are able to post a comment/pics/video in the activity feed as the “post” button and “add media” button below the comment box are completely missing.

I have updated all of the plugins and also the theme itself, as well as deactivating then re-activating the rtmedia plugin, but it’s still the same.

This is a major issue for my site as none of my members can do anything on there and I need to resolve it as soon as possible