Loading spinner freezes while side loading

I ran into the same issue and after a lot of de-bugging, I discovered that the rdp-to-scenegraph-channel-template assumes that every live stream, movie, series, short, or special in your feed will have a genre array with at least one item. If it doesn't have a genre array with one item, it errors and you get the infinite spinner.

Alternatively, you could go into the file RootHandler.brs (rdp-to-scenegraph-channel-template/components/content/RootHandler.brs) and delete/change line 108. (For example I changed mine to use all of a video's tags, because I found those more descriptive)

So this is what my code looks like (starting from line 102 in RootHandler.brs):

for each arrayItem in value
   itemNode = CreateObject("roSGNode", "ContentNode")
   Utils_ForceSetFields(itemNode, {
      hdPosterUrl: arrayItem.thumbnail
      Description: arrayItem.longDescription
      id: arrayItem.id
      Categories: arrayItem["tags"]
      title: arrayItem.title
   })

 Hope this helps! Let me know if you have any other questions!