Cannot post on members walls

Everything was fine on our site up until about an hour ago. Then things started going crazy with posting. I tried to post to a members wall and an invalid token popped up and then i got banned from my own site. Adjusted my security setting now i do not get banned but still cannot post on anyones wall. I have added a few photos and the info you need to log into our site.

(EDIT) This is only happening when trying to post a new post to a members wall. if you are commenting on a post no problem at all