Is there any error message? If so, what does it say?
Can you provide me with a screenshot of what you're seeing? (If you're not sure how to take a screenshot, just let me know and I'll be happy to provide you with some additional steps.)
In the meantime, I'd like to try some troubleshooting steps. From your Android Settings, please try clearing the Pandora app data using the following steps (not to worry, we'll keep track of your profile and collection for you):
Please note:Pandora Premium and Premium Family listeners may need to re-download some of their offline content after this. Pandora Plus users, however, should receive that offline content again automatically. If you have any trouble with your offline stations after this, please let us know.
Open your device Settings
Scroll down to find Pandora
On the storage details page tap Clear Data.
After this, you will be asked to log into your account after completing these steps.