First, you'll need to completely shut down your Xbox One console.
Unplug the Xbox One from the wall outlet or power strip then disconnect the power brick from the back of the console. This step is imperative to ensuring the cache is deleted.
Wait for at least 5 minutes to allow the cache to completely clear. Be sure not to rush this step.
Reconnect the power cable. When the AC adapter light turns orange, turn on your Xbox One.
After it reboots, try accessing the application or feature that was giving you trouble in the first place. If all goes well, the cache clearing has solved your problem!
There are many reasons you might want to access your Comcast Xfinity router. For instance, you may want to change your wireless password or set up port forwarding for a project you are working on.