Please select a valid device before running the application

Hi guys, I have the following problem.
Visual Studio 2017 regularly connects to the device in a remote host, but the device list is not loaded for testing.

At the component level I have

Windows Machine
Visual Studio 2017 -> 15.9.10
Xamarin 4.12.3.81
Xamarin.iOS and Xamarin.Mac SDK 12.2.1.16

Mac machine
Mac OS X 10.14.4 (18E226)
XCode Version 10.2 (10E125)

I noticed that when there is a request for the simulator from the visual studio machine, in the mac machine there is a crash of the mlauncher application, I include the details of the log in case they may be useful because the first line was:

    Process:               mlaunch [3628]
    Path:                  /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.15/lib/mlaunch/mlaunch.app/Contents/MacOS/mlaunch
    Identifier:            mlaunch
    Version:               1.0 (1)
    Code Type:             X86-64 (Native)
    Parent Process:        mono-sgen64 [3592]
    Responsible:           mlaunch [3628]
    User ID:               501