Error: Portals is currently unavailable. (DotNetNuke.Services.Exceptions.ModuleLoadException)

When you navigate to HOST >> Portals in DotNetNuke website you receive the following error.

Error: Portals is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Invalid URI: The format of the URI could not be determined. ---> System.UriFormatException: Invalid URI: The format of the URI could not be determined. at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind) at DotNetNuke.Common.Globals.AddPort(String httpAlias, String originalUrl) at DotNetNuke.Modules.Admin.Portals.Portals.FormatPortalAliases(Int32 PortalID) --- End of inner exception stack trace ---

SOLUTION:

• Login to your DotNetNuke Website as HOST or ADMIN
• Navigate to ADMIN >> Site Settings >> Portal Advanced Settings >> Portal Aliases
• Make sure there is NO "~" or "/" after any portal aliases. If there is "~" or "/" delete it and save.
• Restart the Application from HOST >> Host Settings.