Error

When registering a new server in DNP you can receive the following message:

DNP Server Internal Application Error
DNP Server application is accessible, but returned an error. Try opening DNP Server URL in the browser and see the actual error.

Resolution

Add the following code to global server web.config (by default it's located in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG folder):

<location path="DotNetPanel Server" allowOverride="true">
    <system.web>
      <trust level="Full" originUrl=""/>
      <identity impersonate="false"/>
    </system.web>
  </location>
  <location path="DotNetPanel Enterprise Server" allowOverride="true">
    <system.web>
      <trust level="Full" originUrl=""/>
      <identity impersonate="false"/>
    </system.web>
  </location>