Failed to clone https://github.com/symfony/polyfill-mbstring.git via https, ssh protocols, aborting. - https://github.com/symfony/polyfill-mbstring.git Cloning into bare repository '/tmp/composer-cache/vcs/https---github.com-symfony-polyfill-mbstring.git'... fatal: unable to access 'https://github.com/symfony/polyfill-mbstring.git/': Failed to connect to github.com port 443 after 133957 ms: Could not connect to server - [email protected]:symfony/polyfill-mbstring.git Cloning into bare repository '/tmp/composer-cache/vcs/https---github.com-symfony-polyfill-mbstring.git'... ssh: connect to host github.com port 22: Operation timed out fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.