Hi @Lojo100! Welcome to community! Can you tell me a little more about what is happening?
In the meantime, here are some troubleshooting steps that may help.
First, confirm that your mobile device is connected to the same Wi-Fi network as your Sonos.
Next, check for any updates to the Sonos and Pandora apps. To check for any necessary updates, visit the app store on your device.
If you continue to have trouble after you've done that, make sure that your Sonos' firmware is up to date.
To check for firmware updates from an iOS or Android device, open your Sonos app and tap on the More tab. Select Settings and then Check for Updates.
Once any necessary updates are complete, restart your Sonos device and try Pandora again.