You need to talk to those that helped you root to head back to stock.
Ok so a little background about my phone:
-Os : Marshmallow 6.0.1
-Model number: SM-G800F
-Storage: 11.62 GB
So here is the problem:
A while ago i decided to root my phone as it would grant me the ability to get rid of bloatware (as i found my phone began to get slower and most of those excess apps were of no importance to me) as well as a few other aesthetic modifications . I used the magisck service to root it i found in a youtube video and that was that. I followed through and used the root checker . It was done. I did it. However my excitement was cut short as i had a problem . My sd card was read/write locked . I eventually tossed the sd card and got a new one . It was fine at first , i was able to format the card and all that jazz but when i went into whatsapp and tried to send a picture it showed an error "The file is not a photo"(although it was) . I then tried to download a picture and it displayed the error "The download was unable to complete."
At this point i was confused so i turned to google to see if this was a whatsapp problem by seeing if i could install a photo from there. I attempted to do so , however another error showed up when i tried to install a picture. At this point i did not know what to do so i looked to see what i could find and found nothing that worked and now i am here.
So now i am here hoping that i can find a solution.
Thanks for taking the time to read