Front end admin to upload products no longer working

Hope you are well,
I have TT Marketpress Frontend Admin installed so the store owners can upload products. I have over 80 stores uploading products and recently uploaded new plug ins such as "directory" and 'google maps' then issues started arising. I then did some trouble shootting but the problem is still there.
Each time you go to the front end and access "admin - area" previously you were able to create new products and access store settings but now it just takes you to the products page.
You can no longer upload products. Not sure how to fix this?
Lisa