LinkOS Xamarin iOS bluetooth connectivity

I am having trouble connecting to ZQ520 via bluetooth using its MAC address. It is a Xamarin iOS project and the same piece of code works on Xamarin Android. The device I am using for testing is an iPhone XS running iOS 12.2. I keep getting the following error when I try to open a connection. I have updated info.plist according to the LinkOS guide.

Any help will be appreciated, thanks.

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