I have installed Flarum, all working fine but I’m trying to install extensions and you have to do this with composer apparently. I’m getting this error though.
*******@panel:~/web/**********/public_html/community$ composer require flarum/extension-manager
In RequireCommand.php line 89:
pcntl_signal() has been disabled for security reasons
require [--dev] [--prefer-source] [--prefer-dist] [--fixed] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] [<packages>...]