A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Climbingjack
Greetings! I am Vijay, an Independent Advisor. I am here to work with you on this problem.
The error is because of SEQUENCE function which is not available on your Excel. I am not sure whether this has been rolled out to all Office 365 subscribers or not. As of 24-Sep-18 documentation, this function is available only to select users of Office Insiders.
https://support.office.com/en-us/article/sequen...
Do let me know if you have any more question or require further help.