Thank you for your help erinding-msft
If I go to File- Options- Trust Center- Trust Center Settings- Add-ins: and see that all boxes are unchecked I still get #N/A error.
I'm running Excel on Microsoft 365.
I've really tried to research this issue and it looks like I'm not the only one with this issue for people trying to use RTD in Microsoft 365.
I'm told that 365 does not work correctly with RTD and that I should try a standalone Excel version. How would I go about and try that?