Problem
The following errors are encountered after logging in to the web client:
Possible Solutions
1) If using Internet Explorer, make sure Compatibility View is disabled. It may be enabled by default for intranet sites.
2) Make sure HTTP Activation is installed - found under the '.NET Framework 4.7 Advanced Services' option in the 'Turn Windows features on or off' dialog.
3) Make sure that the proper web.config is used. The Web configuration utility prompts to choose the proper file. Choose HTTPS only if you have installed an SSL certificate.
4) If the site still doesn't work, see if the service handlers are installed correctly -
Within IIS Manager, look under Handler Mappings for the site and see if there are two handlers enabled with:
A) Path: *.svc
Name: svc-Integrated-4.0
Type: System.ServiceModel.Activation.ServiceHttpHandlerFactory, System.ServiceModel.Activation, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
B) Path: *.svc
Name: svc-ISAPI-4.0_32bit
Executable: C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll