please check details of the associated Entry in DNN Eventlog,. If it is the same as above, please check Admin > Site Settings for "special" pages on top of 2nd tab (Login Page etc.) and make sure they are pointing to valid pages (if not empty).

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Cheers from Germany,
Sebastian Leupold

   

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the problem with doing direct database access is that it's easy to break application referential integrity - if it's done via the API the API knows when a core entity has child properties e.g. tabcontroller knows when it adds a page to add page settings. If an import utility is not correctly written it can easily miss part of this and break things. Based on your stacktrace, it seems that there is a failure identifying a special tab. The code which does this is below:

return tabId == portalSettings.SplashTabId || tabId == portalSettings.HomeTabId ||
tabId == portalSettings.LoginTabId || tabId == portalSettings.UserTabId ||
tabId == portalSettings.AdminTabId || tabId == portalSettings.SuperTabId;

My best guess is that something is corrupt - I would suggest looking in the portallocalization table and checking that all the ID columns above are either null or contain tabid's which are tab's within the site (i.e. the tabid exists, and is part of the portal).

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glad to hear it's working again - I suspect some of your user's imported with an impossible (i.e. not installed/enabled) language as their default and that caused a cascading issue. Might be an idea to check your userprofile table and ensure that any entry has a valid preferredlocale -you can run sql such as this to return their records (you may need to change the query, as I use an objectqualifier of dnn_)

SELECT dnn_UserProfile.ProfileID, dnn_UserProfile.UserID, dnn_UserProfile.PropertyValue, dnn_UserProfile.PropertyText,
dnn_ProfilePropertyDefinition.PropertyName
FROM dnn_UserProfile INNER JOIN
dnn_ProfilePropertyDefinition ON dnn_UserProfile.PropertyDefinitionID = dnn_ProfilePropertyDefinition.PropertyDefinitionID
WHERE (dnn_ProfilePropertyDefinition.PropertyName = N'PreferredLocale')

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