Channel 152xxxx does not exist or is not associated with this app

[Samrevive]

I'm also getting errors trying to create a channel account associated with our custom channel:

{
"status": "error",
"message": "Channel 152xxxx does not exist or is not associated with this app",
"correlationId": "0ed52b87-8cae-4b09-ab48-dda9c1ddf031",
"context": {
"channelId": [
"152xxxx"
]
},
"category": "VALIDATION_ERROR",
"subCategory": "CustomChannelsError.INVALID_CHANNEL_ID"
}

I've confirmed that channel is returned from the tenant (our sandbox environment) - this url: https://api.hubapi.com/conversations/v3/conversations/channels

{
"id": "152xxxx",
"name": "Channel Test Three"
}

The association with an app is probably the real issue.  However, I am not provided the option to link the channel anymore.  At one time, at custom channel created with my developer account appeared here, but it is not anymore. I've tried relinking the developer account to my sandbox tenant.

[Jaycee_Lewis]

Hey, @Samrevive 👋 That sounds unexpected for sure. Have you already reached out to support to report this issue? Not to ask for custom coding help, but to report an issue with the product itself? Another next step is to report this to the Developer Feedback form. While not a direct support form, they do want to know about documentation and product issues affecting our APIs and endpoint functionality. — Jaycee