Answer:
Most common issues can be fixed with a quick reinstall of the app. In some situations however, a clean (more thorough) reinstall of the app might be needed. This way, you can start afresh with Spotify on your device.
Heads up: You'll need to re-download any downloaded music and podcasts after reinstalling the app. Your settings will also be reset to the defaults, so it's a good idea to make screenshots of them so you can quickly set them up the way you like them again.
In our Support Site you can find all the steps for a clean install of Spotify on your device for iOS, Android, Mac, and Windows:
Go to Support Article
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