Connectivity Error 014.50 but Wifi is working fine

What should I do if I cannot connect to my home network or the internet? | Official Roku Support

The above link doesn't explain what error 014.50 is, but it suggests restarting your TV and your router.  Note that simply turning the TV off and on doesn't restart it.  Perform a "System restart" located under Settings->System->Power.

Hello! Daizee, cdeon,

Thank you for posting in the Roku Community!

We have received reports that some users with Roku TV are experiencing difficulty connecting to their home network following a recent OS update.

In the meantime, we recommend performing a factory reset. Here's how:

• Locate the reset button on your Roku device, usually on the back or bottom.
• Ensure your Roku TV is powered on.
• Press and hold the reset button for precisely 10 seconds.
• Watch for a fast-blinking light, indicating that the reset is in progress.
• Once the light blinks at an average rate, release the button.

After a successful factory reset, your Roku device will restart in the same state as a factory-new device and will be ready for you to complete the following:

1. Perform the Guided Setup and activation process
2. Sign in to streaming channels that require a username and password
3. Create a 4-digit PIN and configure parental control settings
4. Perform a broadcast television channel scan (if you have a Roku TV with an HDTV antenna connected)

Thanks,
Arjiemar

Hello! SEChoi,

Thanks for the update,

If your Roku TV can connect to mobile data but not your Wi-Fi, we must check with your internet provider. There may be some router settings that are preventing your Roku from establishing a Wi-Fi connection. Additionally, recent updates to some routers—especially those provided by internet service providers—could be causing these issues. It's also possible that similar problems could occur with other internet providers or user-owned routers that have received updates.

If the previous steps did not fix your internet connection issue and you are comfortable working with networking equipment, you can visit the article with advanced troubleshooting tips and networking features.

Thanks,
Arjiemar

Hello! Ken70,

Thank you for posting in the Roku Community!

We completely understand how crucial it is for your Roku device to stay connected to the internet. We're here to help you with any issues you may be facing, and we're here to assist. 

If your router and Roku device support 5GHz, ensure the 5GHz option is enabled in your router's settings. Then, try connecting to the 5GHz wireless network (for example, MyNetwork_5GHz). If you have a mesh router system, note that the 2.4GHz and 5GHz Wi-Fi networks may be combined into a single wireless network.

When your router automatically selects a wireless channel, it can lead to intermittent or slow connectivity due to undetected interference from other wireless devices. Try turning off this automatic setting on your router and choose a wireless channel manually.

Use the following steps to determine which wireless channel your streaming device is connected to.

1. Press Home on your Roku remote
2. Scroll and select Settings
3. Select Network
4. Select About
5. Find the Wireless channel number

If your Roku device is connected to the 5GHz wireless network (channels 36-165) and you have issues, try changing your router's 5GHz channel. If your router only works on 2.4GHz, use channels 1, 6, or 11, which are the best options in North America. Remember to save the changes after changing the wireless channel and restart your router.

For more detailed information, please visit this link: Learn about advanced networking features on your Roku streaming device.

Thanks,
Arjiemar