If you receive an HTTP Error 500 when accessing the
http://[yoursite]/wfgen/graphql page, you can perform the following checks:
Verify that iisnode, URL Rewrite, and Node.js (with the correct version) are properly installed.
Verify that IIS Anonymous authentication mode is disabled in the
Verify that the application pool identity has read/write access to the
Verify that there are no duplicate entries in the
\wfgen\graphql\web.config). If so, remove the duplicates.
Verify the logs located in the
\wfgen\graphql\iisnodefolder on the IIS server.
To enable GraphQL logging, update the GraphQL
web.config file (
\wfgen\graphql\web.config) by changing the
loggingEnabled property to
true in the
<iisnode .... loggingEnabled="true" logDirectory="iisnode" ... />