On some Roku devices users can’t access Hulu or can’t switch the region. The issue occurred after Hulu started to use Google DNS instead of DNS configured on router.
The main purpose of the tutorial is to null route Google DNS addresses. You can find step by step tutorials here:
Solution will not work if your router does not allow to change its settings. Also, there could be problems if your ISP does not allow you to change its preconfigured settings.
This solution will not work on these routers:
The list will be updated.