We are facing issue while adding a gadget 'External review component' in CMS, it throws error as 'Could not add component' pop up.
EPiServer.Global : Unhandled exception in ASP.NETSystem.InvalidOperationException: The JSON request was too large to be deserialized.
Kindly let us know how to overcome this issue?
Can you look into log files to see if there is any stacktrace in there?
One thing you can try is to add this setting to appSettings
<appSettings> <add key="aspnet:MaxJsonDeserializerMembers" value="2500" /></appSettings>