Nightmare scenario - according to my monitoring services, you logged in at 01:49 this morning to fix the issue.
At 02:17 and again at 03:17 someone logged in with MY credentials! At 03:51 the monitoring reported that the site was down.
I've spent the past 3+ hours trying to get my site back up again - it seems the PHP version was somehow rolled back to 7.3 and the database connection was broken. I cannot imagine you had any reason do have done any of this while you were accessing the hosting account.
Now that I have the website working again, I lost the file you uploaded becasue I restored a backup while fixing the files, and no longer have it.
The link you provided returns:
{"errors":[{"status":"404","code":"resource_not_found"}]}
So I can't seem to download it.
Please upload the file or folder with instructions on where to place it.
Thank you,
Ernie