Message+ iPhone connection - Unknown Error

[LVCharlton]

I'm trying to use Message+ on my Company iPhone 8Plus - Using my personal Galaxy Note 4.
It prompts to scan QR Code and upon scanning it says success but then I get a popup saying:

Error

Unknown Error

This feature worked fine until I deleted the app on the iPhone and reinstalled it.

[Ann154]

You can't sync one phone number's Messages+ application to another phone. A tablet or smart watch, yes, but not another phone that has an active separate phone number or not.

[LVCharlton]

@Ann154 Hmm, it worked before on the same phone. I’m not sure that’s the answer. I also login On any other platform be it PC, Mac, Android or Apple Tablet.

[vzw_customer_support]

LVCharlton

We don't want you to miss any important text messages. Did you update the software on your iPhone, as well? Have you powered your device off/on since redownloading the Message+ application to your phone. 

Lasina_VZW
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[LVCharlton]

Everything is on the most current and up to date, yes I have done a full hard reset and a regular power on and off; neither resolve the issue.