I wonder what's supposed to be the problem.

Obviously, a threat found.
The file seems to be blocked that's why it never opened. I have removed it anyway.
You will not received an email COMING FROM ME.
Someone doing some malicious activity here. The form and spreadsheet link was only sent to the participants and not on public.
I have received the same email message with bl4nkcode, however, the sender uses a different email address
(see image below). If the spreadsheet is only visible to you and the bounty participants, most likely the one who did this attempt belongs to that list.

