If you get a '90001' error message when using Chromecast, follow these steps to resolve the issue:
- Make sure you have the latest version of the discovery+ app installed.
- Restart the device you're casting from.
- Ensure all devices (TV and Mobile) are connected to same Wi-Fi network.
- Make sure you're using a supported Chromecast device.
- Make sure you're not connected to a VPN.
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