Windows 10: Phone link messages panel error

https://drive.google.com/file/d/1W4R-XmjtQl_zNsbxxpQU7GPovBhRHINg/view?usp=share_linkHow can i fix it? There is a video of the issue in the link above.

:)

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

Your list confirms my phone is eligible, Lumia 521. The windows Insider App fails after ~ 15 seconds, restores data and gives me error 80073cf9. I trouble shot this and went thru all the steps mentioned on several websites including MS without any luck. Short of a hard reset, this is where I am now. Suggestions appreciated.

 

couldn;'t open phone link & nvidia control panel

1. I couldn't uninstall your phone/phone link, and I could uninstall nvidia control panel, but after I've reinstalled it the problem persist with the same error mesasage
   
2. How to change the owner to everyone? there's no choice for "everyone
   

 

Your Phone Companion is working but often weird

Just more and more "historical" messages. Now, messages I write on the input panel on the right appear in the list on the left but the message I wrote doesn't appear on the right side panel, just more historical messages.

At least the thing seems to work. Sort of two steps forward and three to the left and back.

I wish someone who was a real coder would write a decent app like this, one that was, uh, tested and didn't have an idiotic name like "Your Phone Companion". SIGH.