Azure flask <handler> scriptProcessor could not be found in <fastCGI> application configuration
The <fastCGI> settings must be in the applicationHost.config file (in the system.webServer section) of IIS. Just putting it into web.config does not work (confirmed by testing it on a local IIS, not in Azure). An example configuration may look like this:
<fastCgi> <application fullPath="D:\home\Python27\python.exe" arguments="D:\home\Python27\wfastcgi.py" maxInstances="16" idleTimeout="21600" instanceMaxRequests="10000000" signalBeforeTerminateSeconds="60" xdt:Transform="InsertIfMissing" xdt:Locator="Match(fullPath)"> <environmentVariables> <environmentVariable name="PYTHONHOME" value="D:\home\Python27" /> </environmentVariables> </application></fastCgi>You may want to adjust this configuration.
This should solve it for a local IIS where you can edit applicationHost.config. I'm not sure about Azure, but maybe you can find some hints here: https://github.com/Azure/azure-python-siteextensions/issues/2.