Error exit when joining

[ablce9]

• gpg version: 2.1.18
• git version: 2.19.0
• node version: 8.12.0
• machine: debian stretch

When I try to add myself as a collaborator, the command seems to fail.
Is this from versioning error or something else?

xun@debian:/tmp/doo.2dox3mQspY (master #)$ npm run collaborator:join

> doo.2dox3mqspy@1.0.0 collaborator:join /tmp/doo.2dox3mQspY
> git-signed --join

? Enter your name Shunsuke Tamiya
? Enter your email shunsuketamiya@posteo.net
? Select the GPG key you wish to use for signing your commits Key fingerprint = B603 407C 78A1 8965 7BA8  4214 4E53 D51F 715D AA9D (rsa4096/0x4E53D51F715DAA9D) [Created 2018-09-01 | Expires 2019-09-01]
    - [ unknown] Shunsuke Tamiya <shunsuketamiya@posteo.net>
? Enter the server where you would like to export your public key hkp://keys.gnupg.net
Sending your public key to hkp://keys.gnupg.net...
gpg: "Key" not a key ID: skipping
gpg: "fingerprint" not a key ID: skipping
gpg: "=" not a key ID: skipping
gpg: "B603" not a key ID: skipping
gpg: "407C" not a key ID: skipping
gpg: "78A1" not a key ID: skipping
gpg: "8965" not a key ID: skipping
gpg: "7BA8" not a key ID: skipping
gpg: "4214" not a key ID: skipping
gpg: "4E53" not a key ID: skipping
gpg: "D51F" not a key ID: skipping
gpg: "715D" not a key ID: skipping
gpg: "AA9D" not a key ID: skipping
  Error: Command failed: gpg --keyserver hkp://keys.gnupg.net --send-key Key fingerprint = B603 407C 78A1 8965 7BA8  4214 4E53 D51F 715D AA9D
  gpg: "Key" not a key ID: skipping
  gpg: "fingerprint" not a key ID: skipping
  gpg: "=" not a key ID: skipping
  gpg: "B603" not a key ID: skipping
  gpg: "407C" not a key ID: skipping
  gpg: "78A1" not a key ID: skipping
  gpg: "8965" not a key ID: skipping
  gpg: "7BA8" not a key ID: skipping
  gpg: "4214" not a key ID: skipping
  gpg: "4E53" not a key ID: skipping
  gpg: "D51F" not a key ID: skipping
  gpg: "715D" not a key ID: skipping
  gpg: "AA9D" not a key ID: skipping

  - child_process.js:602 checkExecSyncError
    child_process.js:602:13

  - child_process.js:642 Object.execSync
    child_process.js:642:13

  - join.js:231 pushToPublicServer
    [doo.2dox3mQspY]/[git-signed]/commands/join.js:231:6

  - join.js:153 retrieveInfo
    [doo.2dox3mQspY]/[git-signed]/commands/join.js:153:9