Galaxy S3 Authentication error

[AC Question]

My S3 was working perfectly 2 weeks ago until it gave me this error. My bedroom is very close to the router and still cant connect I know the password is correct. When i go close to the router i can connect fine but if I go into my bedroom which is literally right next to it it cant connect. I changed the Security type of the router to "Open" and it worked fine in my bedroom.

Device- Samsung Galaxy S3 rooted
Version- Android Jellybean 4.3

I have never dropped my phone before or any moisture exposure.

Procedures Ive taken:
Ive entered *#0011# and turned Power Saver Mode off. Didnt work
Factory reset the phone. Didnt work
Reset Router. Didnt work


Thanks in advance
Jon