I'm having the same issue.
After no issues with HULU (or anything else) for a few years with our Roku Streaming Stick, I attempted to run HULU this morning and got this message:
"Network error sorry, we encountered a network error. please check the network connection and try again. if this error persists please visit hulu.com/help"
- All other apps work fine (Netflix, Prime, etc.)
- WiFi signal is strong (per Roku network settings)
- Tried power cycling and resetting the stick to fresh reinstall HULU
- I can open HULU via Roku on all our other TVs (a mix of TCL Roku and Roku Sticks - wired and wireless)
- Moved the stick to another TV with the same failure.
That's all the troubleshooting I can think of. The problem seems to be narrowed down this particular streaming stick.
Anything I didn't think of before I replace the stick?