If your Roku Stick is not connecting to Wi-Fi then restart Roku and also your router.
To restart your Roku player, navigate to Settings and click on System option. Next click on System restart. You can also restart Roku by unplugging it from the power source. After unplugging, wait a few moments and plug again into the power source. But if your Roku is not restarting then immediately connect with Roku Technical Support.
To restart your router, check the instructions from your ISP or router vendor. In some cases, you can simply unplug it and plug it back in. In some cases, it may require pressing a reset button on the device.
After restarting Roku, follow these steps:-
Step 1: First of all make sure your Roku is connected to a proper power supply.
Step 2: Now navigate to Settings and click on Network option. After this choose Wireless (Wi-Fi) > Setup new Wi-Fi connection.
Step 3: Next, you have to choose your wireless network from the list.
Step 4: For connecting Roku to the local network, you have to enter your wireless password in "In-home WiFi" option. If you three green checkmarks are displaying on the screen then you must understand that your setup was successful. (as shown in the figure)
Still having issues then communicate with Roku Customer Service.
Roku Stick Not Connecting to WiFi?