There are various reasons Why Is Hulu Not Working on Firestick. It may include internet connectivity that is not good, or you might be using the outdated Hulu app. Additionally, if such hurdles are occurring, then you might have a problem with the Firestick itself.
Whatever the reasons, getting the right resolutions is a must.
To resolve it, you have to follow certain troubleshooting steps:
Check the internet connection
 Check the Server Error
 Clear Cache
 Update your Firestick and Hulu app.
 Restart your device
 Uninstall and Reinstall the App
These are some proven reasons that you can opt to fix your Hulu not working issue on Firestick effortlessly. However, if your issue is still persisting, then you can connect with customer support to resolve it.
On the other hand, you can click the link provided above; it will give you the step-by-step instructions.