Filter Datatable is not working

Hi @jais1609,

Firstly save and close xaml file by leaving error message as it is.
Now you’ve to open the xaml file in Notepad and add below assembly reference manually (Copy-paste in that notepad) save that notepad, and double click on xaml file to open it.

<AssemblyReference>System.Data.DataSetExtensions</AssemblyReference>

Follow this thread, it’ll help you.