Your requirements could not be resolved to an installable set of packages. Problem 1 - azjezz/psl[2.3.1, ..., 2.7.0] require php ~8.1.0 || ~8.2.0 -> your php version (8.3.0) does not satisfy that requirement. - azjezz/psl 2.8.0 requires ext-bcmath * -> it is missing from your system. Install or enable PHP's bcmath extension. - roave/backward-compatibility-check 8.4.0 requires azjezz/psl ^2.3.1 -> satisfiable by azjezz/psl[2.3.1, ..., 2.8.0]. - Root composer.json requires roave/backward-compatibility-check ^8.4.0 -> satisfiable by roave/backward-compatibility-check[8.4.0]. To enable extensions, verify that they are enabled in your .ini files: - /etc/php/8.3/cli/php.ini - /etc/php/8.3/cli/conf.d/15-xml.ini - /etc/php/8.3/cli/conf.d/20-ctype.ini - /etc/php/8.3/cli/conf.d/20-curl.ini - /etc/php/8.3/cli/conf.d/20-dom.ini - /etc/php/8.3/cli/conf.d/20-mbstring.ini - /etc/php/8.3/cli/conf.d/20-phar.ini - /etc/php/8.3/cli/conf.d/20-simplexml.ini - /etc/php/8.3/cli/conf.d/20-tokenizer.ini - /etc/php/8.3/cli/conf.d/20-xmlwriter.ini - /etc/php/8.3/cli/conf.d/99-pecl.ini You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode. Alternatively, you can run Composer with `--ignore-platform-req=ext-bcmath` to temporarily ignore these required extensions. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.