I'm getting an error when adding a forum or when trying to view a forum. The forum is created but error is displayed on page and I need to refresh the page to see the created forum. When clicking on the created forum the same error appears on the page. The Event Viewer Error Log seems to log the same error when either creating a forum or trying to view a forum. Any advice to correct this would be greatly appreciated. I have uninstalled and reinstalled the forum module and searched on these errors, but have not found much. Thanks.

AssemblyVersion: 5.6.3
ActiveTabID: 228
ActiveTabName: Forum
RawURL: /dt/Forum/tabid/228/forumid/5/scope/threads/Default.aspx
AbsoluteURL: /dt/Default.aspx
AbsoluteURLReferrer: http://victorykofc.org/dt/Forum.aspx
UserAgent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: b364cfb1-994e-4ce9-86e8-f83ff3bb0fc5
InnerException: Operation could destabilize the runtime.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Forum.Threads.CreateChildControls
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Operation could destabilize the runtime. ---> System.Security.VerificationException: Operation could destabilize the runtime. at DotNetNuke.Modules.Forum.Threads.CreateChildControls() at DotNetNuke.Modules.Forum.ForumBaseControl.CreateChildControls() at DotNetNuke.Modules.Forum.DNNForum.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at DotNetNuke.Modules.Forum.ForumBaseControl.EnsureChildControls() at DotNetNuke.Modules.Forum.DNNForum.Initialize() at DotNetNuke.Modules.Forum.ForumBaseControl.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---


Page Error:

A critical error has occurred.
Operation could destabilize the runtime.

Update: Installed 05.01.02 once again and problem is solved. Could not install .03 as I'm running Core 5.6.3. On a side note upgrading to 6.0 on Godaddy has failed numerous times. Upgrade installs but websites do not display correctly, login errors etc. Will stick with 5.6.3 for now.