If we try to filter an igxColumn through the excelStyleFiltering and we have provided a uniqueColumnValueStrategy to the igxGrid an error is thrown. See attachments.
Cannot read property 'dataType' of null error is thrown.
No errors to be thrown.

@astaev, Could you please check if this issue is resolved by the fix of #8388.
@mmart1n, @DiyanDimitrov
The issue is not reproducible with 10.1.11 version, which contains the fix for #8388.