An error appeared in one of the Power BI Reports used daily within my business. This report has been running and refreshing successfully for over a year. However now when refreshing this error appears.
After doing some digging in the Power Query Editor, I have found an error being caused by the "Group By" function,
Has anyone encountered this, and know how to resolve the issue - the other "Group By" functions in other tables are showing the same error message.
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