Applies to:
Enable Page Loading for SharePoint 2013
Configuring Workflow 10.5-10.7
To enable page loading for FormEx/DocEx in SharePoint 2013, use a text editor to change the following key in the Web.Config file.
The Web.Config file can be found at the location on the server machine where workflow is installed (C:\inetpub\wwwroot\wss\VirtualDirectories\<Port>)
Key
<add key="aspnet:AllowAnonymousImpersonation" value="false" />