OS type: Linux
   OS name: Linux Mint
OS release: 20
   OS bits: x86_64
 CPU count: 2
  Error: Unable to parse string '20' as a valid Ubuntu release version
Failed to initialize operating system support
System.InvalidOperationException: Failed to initialize operating system support
  at Xamarin.Android.Prepare.OS.Init () [0x00024] in /home/zola/Desktop/xamarin-android/build-tools/xaprepare/xaprepare/OperatingSystems/OS.cs:243 
  at Xamarin.Android.Prepare.Context.Init (System.String scenarioName) [0x0022d] in /home/zola/Desktop/xamarin-android/build-tools/xaprepare/xaprepare/Application/Context.cs:766 
  at Xamarin.Android.Prepare.App.Run (System.String[] args) [0x00793] in /home/zola/Desktop/xamarin-android/build-tools/xaprepare/xaprepare/Main.cs:153
make: *** [Makefile:204: prepare] Error 1

   OS type: Linux
   OS name: Linuxmint
OS release: 20
   OS bits: x86_64
 CPU count: 2
  Error: Unable to parse string '20' as a valid Ubuntu release version
Failed to initialize operating system support
System.InvalidOperationException: Failed to initialize operating system support
  at Xamarin.Android.Prepare.OS.Init () [0x00024] in /home/zola/Desktop/xamarin-android-10.3.1.4/build-tools/xaprepare/xaprepare/OperatingSystems/OS.cs:245 
  at Xamarin.Android.Prepare.Context.Init (System.String scenarioName) [0x0026c] in /home/zola/Desktop/xamarin-android-10.3.1.4/build-tools/xaprepare/xaprepare/Application/Context.cs:761 
  at Xamarin.Android.Prepare.App.Run (System.String[] args) [0x0078a] in /home/zola/Desktop/xamarin-android-10.3.1.4/build-tools/xaprepare/xaprepare/Main.cs:153 
make: *** [Makefile:202: prepare] Error 1

[00:00:00.0438924] All defined properties:
[00:00:00.0636711]   AndroidCmakeVersion = 3.10.2
[00:00:00.0637333]   AndroidCmakeVersionPath = 3.10.2.4988404
[00:00:00.0637463]   AndroidLatestStableFrameworkVersion = v11.0
[00:00:00.0637557]   AndroidMxeFullPath = /usr
[00:00:00.0638016]   AndroidNdkDirectory = /home/zola/android-toolchain/ndk
[00:00:00.0638196]   AndroidSdkDirectory = /home/zola/Android/Sdk
[00:00:00.0638284]   AndroidSupportedHostJitAbis = Linux
[00:00:00.0638369]   AndroidSupportedTargetAotAbis = armeabi-v7a:arm64:x86:x86_64
[00:00:00.0638454]   AndroidSupportedTargetJitAbis = armeabi-v7a:arm64-v8a:x86:x86_64
[00:00:00.0638542]   AndroidToolchainCacheDirectory = /home/zola/android-archives
[00:00:00.0638624]   AndroidToolchainDirectory = /home/zola/android-toolchain
[00:00:00.0638712]   AutoProvision = False
[00:00:00.0639037]   AutoProvisionUsesSudo = False
[00:00:00.0639172]   CommandLineToolsFolder = 1.0
[00:00:00.0639258]   CommandLineToolsVersion = 6200805_latest
[00:00:00.0639345]   Configuration = Debug
[00:00:00.0639889]   EmulatorPkgRevision = 30.0.12
[00:00:00.0639994]   EmulatorVersion = 6466327
[00:00:00.0640076]   IgnoreMaxMonoVersion = True
[00:00:00.0640156]   IgnoreMinMonoVersion = @IgnoreMinMonoVersion@
[00:00:00.0640238]   JavaInteropFullPath = /home/zola/Desktop/xamarin-android/external/Java.Interop
[00:00:00.0640568]   JavaSdkDirectory = 
[00:00:00.0640696]   LibZipSourceFullPath = 
[00:00:00.0640782]   ManagedRuntime = mono
[00:00:00.0640861]   MingwCommandPrefix32 = i686-w64-mingw32
[00:00:00.0640940]   MingwCommandPrefix64 = x86_64-w64-mingw32
[00:00:00.0641023]   MingwDependenciesRootDirectory = /home/zola/Desktop/xamarin-android/bin/BuildDebug/mingw-deps
[00:00:00.0641113]   MingwZlibLibraryName = libz.a
[00:00:00.0641192]   MingwZlibRootDirectory32 = /usr/i686-w64-mingw32
[00:00:00.0641460]   MingwZlibRootDirectory64 = /usr/x86_64-w64-mingw32
[00:00:00.0641630]   MonoDarwinPackageUrl = https://xamjenkinsartifact.azureedge.net/build-package-osx-mono/2020-02/45/d90665a422e9f8d015585b3ca381d74faa033cc4/MonoFramework-MDK-6.12.0.43.macos10.xamarin.universal.pkg
[00:00:00.0641857]   MonoRequiredMaximumVersion = 6.12.99
[00:00:00.0641944]   MonoRequiredMinimumVersion = 6.12.0.43
[00:00:00.0642032]   MonoSourceFullPath = /home/zola/Desktop/xamarin-android/external/mono
[00:00:00.0642116]   ProductVersion = 11.1.99
[00:00:00.0642200]   RemapAssemblyRefToolExecutable = /home/zola/Desktop/xamarin-android/bin/BuildDebug/remap-assembly-ref.exe
[00:00:00.0642523]   XABinRelativeInstallPrefix = lib/xamarin.android
[00:00:00.0642661]   XABuildToolsFolder = 29.0.2
[00:00:00.0642745]   XABuildToolsVersion = 29.0.2
[00:00:00.0642833]   XAInstallPrefix = /home/zola/Desktop/xamarin-android/bin/Debug/lib/xamarin.android/
[00:00:00.0642920]   XAPackagesDir = /home/zola/Desktop/xamarin-android/packages
[00:00:00.0643008]   XAPlatformToolsPackagePrefix = 
[00:00:00.0643084]   XAPlatformToolsVersion = 30.0.2
[00:00:00.2051567] Setting condition AllowProgramInstallation to 'True'
[00:00:00.2112680] Main log file: [00:00:00.2121140] /home/zola/Desktop/xamarin-android/bin/BuildDebug/prepare-20200716T182747.log
[00:00:00.2136645] 
[00:00:00.2144446] =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[00:00:00.2153578] Detecting operating system
[00:00:00.2155641] =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[00:00:00.2157953] 
[00:00:00.3306862] Running: uname "-m"
[00:00:00.3986177] 
[00:00:00.3992715]    OS type: [00:00:00.3999262] Linux
[00:00:00.4005319]    OS name: [00:00:00.4012670] Linux Mint
[00:00:00.4018295] OS release: [00:00:00.4027067] 20
[00:00:00.4032952]    OS bits: [00:00:00.4040494] x86_64
[00:00:00.4049658]  CPU count: [00:00:00.4054127] 2
[00:00:00.4058663] 
[00:00:00.4684486] Initializing scenario Standard
[00:00:00.4935300] Windows JIT ABis DISABLED, SKIPPING MinGW dependencies build step
[00:00:00.4938637] Adding Windows GAS download step (AFTER bundle)
[00:00:00.5069311]   Error: Unable to parse string '20' as a valid Ubuntu release version
[00:00:00.5249730] 
[00:00:00.5252756] Failed to initialize operating system support
[00:00:00.5495689] System.InvalidOperationException: Failed to initialize operating system support
[00:00:00.5495689]   at Xamarin.Android.Prepare.OS.Init () [0x00024] in /home/zola/Desktop/xamarin-android/build-tools/xaprepare/xaprepare/OperatingSystems/OS.cs:243 
[00:00:00.5495689]   at Xamarin.Android.Prepare.Context.Init (System.String scenarioName) [0x0022d] in /home/zola/Desktop/xamarin-android/build-tools/xaprepare/xaprepare/Application/Context.cs:766 
[00:00:00.5495689]   at Xamarin.Android.Prepare.App.Run (System.String[] args) [0x00793] in /home/zola/Desktop/xamarin-android/build-tools/xaprepare/xaprepare/Main.cs:153 
[00:00:00.5502445]