Hi im having the same issues where you able to solve those issues I tried multiple things and still get the same error messages If you find the solution can you share it with us - Thank You!
Still struggling with these issues my channels works perefectly when side loaded to my Roku devices but when I do the test I still get these error messages I even emailed Roku TEAM but there was no response.
I use Vimeo and instanttv. I currently use the free plan in instanttv but wanted to start running ads. Which process do you use? Maybe there is a bug in there system.