I have a similar issue. My preview shows a list of videos, but the channel has about and search links that don't work. I checked my categories they seem to be fine.

I have a feed url from Vimeo. How do I find feed file?

I'm encountering the same issue, on preview looks good, the Feed Status is not returning any error but on the Roku device I can see only the "empty" channel, just the basic template.

Bellow is the json script, maybe it can help, there are two channels and two categories (movie and children):

{
"lastUpdated": "2020-04-26T12:13:40+00:00",
"providerName": "Hedex TV",
"language": "en-US",
"liveFeeds": [
{
"id": "b57fa05f3a4243c38905bae8bd9f4f02",
"title": "Spydar TV",
"content": {
"dateAdded": "2020-04-25T21:03:57+00:00",
"videos": [
{
"url": "https://xxxxxxxxxxx/xxxxx/xxxxxxxx/xxxxxxxxxxxxxx/playlist.m3u8",
"quality": "SD",
"videoType": "HLS"
}
],
"duration": 86400
},
"thumbnail": "https://www.hedex.tv/uploads/images/clip_428_1587822158_poster.png",
"brandedThumbnail": "https://www.hedex.tv/uploads/images/clip_428_1587822158_poster.png",
"shortDescription": "Spydar Tv classic movies",
"longDescription": "On Spydar Tv you can watch your favorite classic movies",
"tags": [
"movie"
],
"rating": {
"rating": "UNRATED",
"ratingSource": "MPAA"
},
"genres": [
"action",
"adventure",
"crime",
"drama",
"romance"
]
},
{
"id": "12d30d6eca7a44dfac4cdfefcb1c547f",
"title": "Kartoon Circus",
"content": {
"dateAdded": "2020-04-25T21:07:23+00:00",
"videos": [
{
"url": "https://xxxxxxxxxxxxx/xxxx/xxxxxxxx/xxxxxxxxx/playlist.m3u8",
"quality": "SD",
"videoType": "HLS"
}
],
"duration": 86400
},
"thumbnail": "https://www.hedex.tv/uploads/images/clip_431_1587830947_poster.png",
"brandedThumbnail": "https://www.hedex.tv/uploads/images/clip_431_1587830947_poster.png",
"shortDescription": "Kartoon Circus",
"longDescription": "Kartoon Circus where you can watch classic cartoons",
"tags": [
"cartoon"
],
"genres": [
"children"
]
}
],
"categories": [
{
"name": "Movie",
"query": "movie",
"order": "most_recent"
},
{
"name": "Cartoon",
"query": "cartoon",
"order": "most_recent"
}
]
}

I'm encountering the same situation, on preview looks good, but on the Roku device it won't show anything but the Search and the About menu which are both "dead". 

For information purposes I am showing bellow my Json script, maybe it could be helpful if the problem really is on my side.  The Feed Status check didn't returned any error. 

{
"lastUpdated": "2020-04-26T12:13:40+00:00",
"providerName": "Hedex TV",
"language": "en-US",
"liveFeeds": [
{
"id": "b57fa05f3a4243c38905bae8bd9f4f02",
"title": "Spydar TV",
"content": {
"dateAdded": "2020-04-25T21:03:57+00:00",
"videos": [
{
"url": "https://xxxxxxxxxxx/xxxxxxx/xxxxxxxx/xxxxxxxxxxxxxxxxxxx/playlist.m3u8",
"quality": "SD",
"videoType": "HLS"
}
],
"duration": 86400
},
"thumbnail": "https://www.hedex.tv/uploads/images/clip_428_1587822158_poster.png",
"brandedThumbnail": "https://www.hedex.tv/uploads/images/clip_428_1587822158_poster.png",
"shortDescription": "Spydar Tv classic movies",
"longDescription": "On Spydar Tv you can watch your favorite classic movies",
"tags": [
"movie"
],
"rating": {
"rating": "UNRATED",
"ratingSource": "MPAA"
},
"genres": [
"action",
"adventure",
"crime",
"drama",
"romance"
]
},
{
"id": "12d30d6eca7a44dfac4cdfefcb1c547f",
"title": "Kartoon Circus",
"content": {
"dateAdded": "2020-04-25T21:07:23+00:00",
"videos": [
{
"url": "https://xxxxxxx/xxxxxx/xxxxxx/xxxxxxxxxxxxxxxxxx/playlist.m3u8",
"quality": "SD",
"videoType": "HLS"
}
],
"duration": 86400
},
"thumbnail": "https://www.hedex.tv/uploads/images/clip_431_1587830947_poster.png",
"brandedThumbnail": "https://www.hedex.tv/uploads/images/clip_431_1587830947_poster.png",
"shortDescription": "Kartoon Circus",
"longDescription": "Kartoon Circus where you can watch classic cartoons",
"tags": [
"cartoon"
],
"genres": [
"children"
]
}
],
"categories": [
{
"name": "Movie",
"query": "movie",
"order": "most_recent"
},
{
"name": "Cartoon",
"query": "cartoon",
"order": "most_recent"
}
]
}