Wifi not working after installing pop os

I am new to Linux, I installed pop os today on a windows laptop. but after the install for some reason, the wifi stopped working. It connects to the network but doesn't load anything and it has a question mark on the wifi icon most of the time. I have already tried everything this website says but nothing seems to work. Link. My network controller is a Broadcom BCM4313 802.11bgn. It works when the ethernet cable is plugged it when removed it stops working.