If still, you are facing any issue then reset your Linksys router to Factory Settings.
For resetting Linksys router to factory settings, first, locate the "Reset" button. On some routers, it is present on the backside, while on others, it is on the bottom. The button displays as a small hole. Now take a sharp paperclip and press the Reset button for 30 seconds. Release the button after 30 seconds, and then unplug the router from the wall outlet. Wait for a couple of minutes and then plug the router back in.
Connect your computer via Ethernet cable and log in to the Linksys router settings using the default values. Now, all previous settings will get erased, so you'll need to reconfigure your wireless network and set a new admin username and password.
How do I Reset My Linksys Wireless Router?