Application crashes on Windows Server 2016

From Event Viewer:

**Source: .NET Runtime**
Application: WindowsDefenderPerformanceTool.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IO.FileNotFoundException
at ReactiveUI.RxApp..cctor()

Exception Info: System.TypeInitializationException
at ReactiveUI.RxApp.get_MainThreadScheduler()
at WindowsDefenderPerformanceTool.MainViewModel..ctor(Boolean)
at WindowsDefenderPerformanceTool.Program.Main()

**Source: Application Error**
Faulting application name: WindowsDefenderPerformanceTool.exe, version: 1.0.0.0, time stamp: 0xc71baee9
Faulting module name: KERNELBASE.dll, version: 10.0.14393.9234, time stamp: 0x6a23a39e
Exception code: 0xe0434352
Fault offset: 0x0000000000026ea8
Faulting process id: 0x1ec4
Faulting application start time: 0x01dcfce011063619
Faulting application path: C:\Users\rgadmin\Desktop\WindowsDefenderPerformanceTool.exe
Faulting module path: C:\Windows\System32\KERNELBASE.dll
Report Id: 37523696-1dab-4eb7-b5f0-ddb4517896a1
Faulting package full name:
Faulting package-relative application ID:

**Source: Windows Error Reporting**
Fault bucket 2072513201527030399, type 5
Event Name: CLR20r3
Response: Not available
Cab Id: 0

Problem signature:
P1: WindowsDefenderPerformanceTool
P2: 1.0.0.0
P3: c71baee9
P4: WindowsDefenderPerformanceTool
P5: 1.0.0.0
P6: c71baee9
P7: 83
P8: 103
P9: System.TypeInitialization
P10:

Attached files:
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER7F7A.tmp.WERInternalMetadata.xml

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_WindowsDefenderP_ba768a9c261a05640255e5113d0c32eb53232c6_c576e466_25f0813f

Analysis symbol:
Rechecking for solution: 0
Report Id: 37523696-1dab-4eb7-b5f0-ddb4517896a1
Report Status: 0
Hashed bucket: 44a4b49abe5cfbb7acc30bc6b153827f