Tips on Simulating a FIT File?

I'm developing a data field and would like to validate the data and features. I tried to load a FIT file from a previous hike, but I'm getting errors.

I went to Garmin Connect on the web, selected one of my previous hikes, then clicked the settings icon for the activity and chose "Export Original." This successfully exported a .fit file.

I then go into VS Code, select Simulation -> Activity Data, choose FIT/GPX Playable File, Load the .fit file I had exported, but I immediately receive a Simulate Error window displaying:

10:25:32: can't create file '/var/folders/dp/b10pv5395l1_lpzwzchngnjr0000gp/T/GARMIN/FILE.FIT' (error 2: No such file or directory)
10:25:32: Error copying the file '/Users/myusername/Desktop/5090424381_ACTIVITY.fit' to '/var/folders/dp/b10pv5395l1_lpzwzchngnjr0000gp/T/GARMIN/FILE.FIT'.

Am I doing everything right? I see that first error is looking for a file/directory. Most of that path does exist, but I don't see the /GARMIN directory inside of /T.

Any help would be greatly appreciated!