0x800a138f - JavaScript runtime error: Unable to get property 'UI' of undefined or null reference

You might be wondering what is this error and what you have to do to resolve “0x800a138f - JavaScript runtime error: Unable to get property 'UI' of undefined or null reference” error. Here is the answer for you.

Reason for this error: This error normally occurs when you use ScriptManager, like below, because most of the controls from AjaxControlToolKit work using Ajax script unfortunately many Ajax scripts are not updated in ScriptManager.

<asp:ScriptManager ID="ScriptManager1" runat="server">

        </asp:ScriptManager> 

Solution to resolve this error: You have to use ToolkitScriptManager instead of ScriptManager. ToolkitScriptManager adds most of the updated Ajax Script. Your code after changing must be like below,

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">

 </asp:ToolkitScriptManager>

After changing to ToolkitScriptManager run your project and see the output.

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The Report Server Installation Is Not Initialized (rsReportServer Not Activated)

Technorati Tags: The Report Server Installation Is Not Initialized (rsReportServer Not Activated)

This is one of the common error you may get when you rebuild or restore or upgrade your reporting server database and browse the report service manager URL. You may get the similar error when you browse the .rdl report also which was working earlier when your server was running fine.

To resolve this error you may follow one of the below steps,

Option 1:

• Open Reporting Services Configuration Manager
• Go to Encryption Keys
• Delete Encrypted Content
• Click on Delete

Option 2:

• Go to Reporting Services Configuration Manager.
• Go to "Encryption Keys" to backup the key.
• Navigate to "Database" tab.
• Click "Change Credentials" to reset the connections.

Now you will be able to browse the report without any issue.