Commented Unassigned: Error when adding new site [25885]

When I try to add a site I get
"Error creating the Web Proxy specified in the 'system.net/defaultProxy. configuration section."
Comments: ** Comment from web user: BdeJager **

Please check the SPCB2013.exe.Config file for incorrect values. If this does not work, remove the SPCB2013.exe.Config file and restart the SPCB tool.