Double check your IP
If your device used to connect but it suddenly stopped, you may find that your home network used DHCP to dynamically assign a new IP address to your PC everytime it connects to your network. Verify this by using this guide to find your PC's current local IP address. Check this with the address that you have in your App's settings. If they are different, you will need to use this guide to configure your PC to use a static IP address. This will ensure the IP address of your PC will always be the same.
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