Thank you for your patience.
We have validated the issue “NullReferenceException is raised after debugging when we define GridTemplateColumn without CellTemplate in XAML” in Xamarin forms. for the same, we have logged a defect report. and the fix for the issue will be included in 2019 Volume 2 main release which is scheduled to be rolled out by mid of July 2019. We appreciate your patience until then.
You can now track the status of this issue and contact us for any further inquiries through this link,
Pradeep Kumar B