Can't Upgrade Dropbox Due to Key Error?

I am trying to upgrade dropbox to 143.4.4161-1 from (139.4.4896-1), but am having some difficulty. It says that the appropriate PGP signatures could not be verified:

==> Verifying source file signatures with gpg...
    dropbox-lnx.x86_64-143.4.4161.tar.gz ... cat: write error: Broken pipe
==> ERROR: One or more PGP signatures could not be verified!

Typically, there is a solution on the AUR page, but in this case, there isn’t. I have tried various key imports from 2021 (comments made in this year) from the AUR page, including this one:

root@MidnightStarSign:/home/sarah# curl | gpg --import
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   975  100   975    0     0   8170      0 --:--:-- --:--:-- --:--:--  8193
gpg: key FC918B335044912E: "Dropbox Automatic Signing Key <>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1

But they all say that I already have the key.

I followed the sticky thread (AUR package fails to verify PGP/GPG key: “unknown public key”, “One or more PGP signatures could not be verified!” - #3)'s advice about searching for the key, but was unable to find it.

What should I do to build the package?

DO NOT run that from a root prompt. The key should be added to your personal keyring, NOT the system keyring.

I’m having the same issue.

The solution is in the first comments of the AUR page: AUR (en) - dropbox