Hikvision iVMS-4500 Incorrect Channel Number?

I have a couple of customers who are experiencing the same problem. The first channel on the phone app says "Failed to connect...Incorrect channel number". All of the other cameras connect on the app. All of the cameras are fine on the NVR as well as from a web browser. I have the systems loaded on my phone with no issues at all.

Anyone know a solution?

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