Hello I have been having an issue with a module error, any help appreciated.

My site is running DNN platform V9.01 and has US/GB versions of each apge. On only one page (US) you cannot edit the content or open the options of any of the modules on that page. Attempting to open the options/settings for a module gives the following errors:

1.  Error: 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.Modules.Admin.Modules.ModuleSettingsPage.OnInit(EventArgs e) --- End of inner exception stack trace ---
2. Error: 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.Security.Permissions.PermissionProvider.CanDeleteModule(ModuleInfo module) at DotNetNuke.Modules.Admin.Modules.ModuleSettingsPage. (EventArgs e) --- End of inner exception stack trace ---
   

I believe the issue is with just this page as all other pages, including the GB localized version of the page (which has identical content) work correctly and have no issues.I have looked through the database at the relevant pages/modules and as far as I can tell their settings are identical to the rest of the pages which are working. Is there any thing else I should be looking for? Or any suggestions on solutions for the issue?

Thanks,
Bradley