Fatal error: Uncaught Error: Interface 'Google\Auth\ExternalAccountCredentialSourceInterface' not found in /home/3kyo4/www/test-spreadsheet-output/vendor/google/auth/src/CredentialSource/FileSource.php:27 Stack trace: #0 {main} thrown in /home/3kyo4/www/test-spreadsheet-output/vendor/google/auth/src/CredentialSource/FileSource.php on line 27