Running PowerwallCompanionX's fork to Xamarin Forms 2.5 failed... so strange

[mediaexplorer74]

Hi, Tom.
I'm continue dreaming to run PowerwallCompanionX at my Lumiaphone with Win10Mobile os =)
I forked PowerwallCompanionX (https://github.com/mediaexplorer74/TeslaX), then I tried to "transform" PowerwallCompanionX onto TeslaX project that uses .NET 1.4 and Xamarin Forms 2.5. The Result: project completely failed. Reason: unknown. Debugging impossible... Idk what to do. :(

In Steps folder, 3 steps : 1) "Empty" solution with .NET 1.4 and XF 2.5 - ok, app runs; 2) Newtonsoft.JSON package edded, and on is ok too. 3) TeslaAuth (reworked) and PanCardView (reworked for .1.4 compatibility) added.... and MainPage = new MainPage generates NullableException...
If I do switching (at TeslaX.UWP project) min.os.build to 16299 and increasing XF to 5.0, the app starts successfully.... Very, very strange Xamarin bihavior... ^ ^

Help me If you can...

Best regards,
MediaExplorer

P.S. My Plan B is XF deletion... and using UNO Platform.