Additional info on my same problem:
I thought I would try Update in the Help Module Settings, even though it did not recognize any Categories. But this resulted in:
Error: Module is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(PortalModuleBase ctrlModule, Exception exc) at DotNetNuke.Modules.Help.Settings.UpdateSettings() at DotNetNuke.Modules.Admin.Modules.ModuleSettingsPage.cmdUpdate_Click(Object Sender, EventArgs e) --- End of inner exception stack trace ---
When I went back to the page, the following was displayed "under" (not in) the Help module:
Unhandled error loading module.
DotNetNuke.Services.Exceptions.ModuleLoadException: Unhandled Error Adding Module to ContentPane ---> System.InvalidCastException: Conversion from string "" to type 'Integer' is not valid. ---> System.formatException: Input string was not in a correct format. at Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberformatInfo Numberformat) at Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) --- End of inner exception stack trace --- at Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) at Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(Object Value) at DotNetNuke.Modules.Help.Help.get_ModuleActions() at DotNetNuke.Entities.Modules.PortalModuleBase.LoadActions() at DotNetNuke.Entities.Modules.PortalModuleBase.get_Actions() at DotNetNuke.UI.Skins.Skin.ProcessActionControls(PortalModuleBase objPortalModuleBase, Control objContainer) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) --- End of inner exception stack trace ---
At this point, no container menus (actions) are displayed or accessible, so I cannot even try to get back to the settings.
I hope the above info helps to recognize and solve this problem. I am still dead in the water with this.