Blueendless Kimax BS-U35WF Router Error 206

Hi i am using this NAS drive everything works fin the only problem is that it starts giving this error after a while logging into the web interface and then having to restart again it login but after a while same issue so please if anyone can guide me what is causing this issue or any fix for this problem (THANKYOU IN ADVANCE TO WHOEVER WHO WILL SOLVE THIS IS PROBLEM)