1. Go to Manage Jenkins > Credentials
2. Select a Domain
3. Click on Add Credentials
4. Select SSH Username with private key
5. Click on Enter directly
6. Enter a valid ciphered private key (e.g.: rsa 2048)
   • Validation error stating the credential is too short → EXPECTED
7. Enter the passphrase
   • Validation should be updated, but remains → UNEXPECTED

If you inspect the Console, there’s a javascript error