Object reference and a Nullable object error when opening tool and when trying to add attributes to entity

[jxs0900]

FetchXMLBuilder version 1.2022.1.4

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************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at Cinteros.Xrm.FetchXmlBuilder.DockControls.TreeBuilderControl.HandleNodeMenuClick(String ClickedTag)
at System.Windows.Forms.LinkLabel.OnLinkClicked(LinkLabelLinkClickedEventArgs e)
at System.Windows.Forms.LinkLabel.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Label.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[ali-shafique]

I am having exactly the same issue. I did tried the following but did not worked.

1. Backup your connections folder in C:\users\appData\your_login\Roaming\MscrmTools\XrmToolBox
2. Backup your settings folder in C:\users\appData\your_login\Roaming\MscrmTools\XrmToolBox
3. Delete content of folder C:\users\appData\your_login\Roaming\MscrmTools\XrmToolBox
4. Start XrmToolBox again. There shouldn't be error/problem anymore
5. Install tools from Tool Library
   This solution is not working.

[rappen]

Thanks @jxs0900 and @ali-shafique

I see the same error for all-attributes, so currently this done not work.
It will be fixed.
Until the fix is released, you can use it without the all-attributes - it works the same way (for simply queries).

See: