I can't install Cobra [gacutil error]

When I install Cobra (Install From Workspace.exe) I get an error telling me that it does not find gacutil while it is on my computer, i also have opened cmd with administrator (see screen)
Discussion about the Cobra programming language.
http://cobra-language.com/forums/
# The .NET team cannot decide on a location for gacutil.exe
dirs = [
# VS 2017
r'\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.2 Tools\x64',
r'\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.2 Tools',
r'\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools\x64',
r'\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools',
# Windows 8.1 SDK
r'\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.5.1 Tools\x64',
r'\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.5.1 Tools',
r'Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools', # VS 2012
r'\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools', # VS2012
r'Microsoft SDKs\Windows\v7.1\Bin', # VS 2010
r'Microsoft SDKs\Windows\v7.1\Bin\NETFX 4.0 Tools\x64', # VS2010
r'Microsoft SDKs\Windows\v7.1\Bin\NETFX 4.0 Tools', # VS2010
r'Microsoft SDKs\Windows\v6.0A\bin', # VS 2008
r'Microsoft.NET\SDK\v2.0\bin', # VS 2005 / SDK .NET 2.0
r'Microsoft Visual Studio 8\SDK\v2.0\Bin',
]