Fatal error: Uncaught RuntimeException: Please run "composer install". in /volume1/web/projects/spaceticker.app.src/public/index.php on line 6

RuntimeException: Please run "composer install". in /volume1/web/projects/spaceticker.app.src/public/index.php on line 6

Call Stack:
    0.0002     360656   1. {main}() /volume1/web/projects/spaceticker.app.src/public/index.php:0