Issue Selecting Column in "Group" Function

I am having an issue grouping data by column. In the “Group” function, my “Group by Column” field is blank and does not allow me to select a column to group from (see screenshot below). When I manually enter the column (in multiple different ways) I am returned with an error.
Please help me! How can I fix this issue? This is affecting many aspects of my workflow

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Did you solve the issue? I have same problem.

Hi Andrea

Try changing the datatype (i.e.: ‘format’) to “tabular” (using the ‘pencil icon’)

Regards, Hans-Rudolf

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