Could not open file "because it is not supported"

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Adobe is having an issue opening a file that is in a onedrive type application called "Box".
The user has no problems opening the file from the web GUI but when I attempt to have it opened from the file explorer it failed to open and gives this error :

[try67]

Download the file locally and try to open it from there. Does it work then?

If not, open it using a plain-text editor, like Notepad. What's the first line you see?