Roku 4k Stick won't load Netflix anymore

I have had this model 3820R2 for 3 years, and had been working just fine. About a month ago, we went to watch Netflix on our device and had issues. The channel would begin loading, allow me to select user and then close and go back to the home screen. I have some experience with testing the units, so removed the channel and re-added it and we had the same issue. I have tried powering everything down, not sure why this is suggested and went through same process and had the same results. I have a version of the Netflix app that was provided by a test site I was part of and it works. Not sure why the standard app was working on this device and stopped. It has to be some update that has changed the functionality of Netflix on the 3920R2 device. Please investigate and fix. thank you.