IIS: Internal Server Error scriptProcessor could not be found in application configuration

I am trying to set up a Flask webapp through IIS 8.5. Even though it worked before, but now it sopped completely giving me ERROR 500: 

Internal Server Error

<handler> scriptProcessor could not be found in <fastCGI> application configuration

I tried every possible solution there is, I checked and double checked the applicationhost.config over and over, I removed and added the handler, I even removed CGI and installed it again with no vain.

the applicationhost.config looks like this; what am I missing here and how to solve this

<fastCgi><application fullPath="C:\Python34\python.exe arguments="C:\inetpub\wwwroot\AppTest\wfastcgi.py"><environmentVariables><environmentVariable name="WSGI_HANDLER" value="app.app" /><environmentVariable name="PYTHONPATH" value="C:\inetpub\wwwroot\AppTest\" /></environmentVariables></application></fastCgi>

<location path="Default Web Site"><system.webServer><handlers accessPolicy="Read, Script"><add name="FlaskHandler" path="*" verb="*" modules="FastCgiModule" scriptProcessor="C:\Python34_x86\python.exe|C:\inetpub\wwwroot\AppTest\wfastcgi.py" resourceType="Unspecified" requireAccess="Script" /></handlers></system.webServer></location>