I have been facing this error when trying to create a 18 row excel file from a datatable. I had no problems creating another dummy excel using this activity but with a different format. Also, I digged deep in all the similar issues opened on this topic.
Im using the latest stable ExcelActivity version : 2.16.1, and no downgrade did anything good.
[SOLUTION] Pay attention to your column types - It seems that when converting Guid columns from datatable into excel columns this crash occurs, so better use String type instead.
This solved my problem after a day lost on this issue.
Hope that this might be also the key for others struggling…
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