Problem 1
– laravel/framework[v5.5.0, …, v5.5.50] require ext-mbstring * -> it is missing from your system. Install or enable PHP’s mbstring extension.
Workaround: Install the required mbstring extension.
Installation command.
sudo apt-get install php-mbstring
Your requirements could not be resolved to an installable set of packages.
Problem 1
- mews/captcha is locked to version 3.2.4 and an update of this package was not requested.
- mews/captcha 3.2.4 requires php ^7.2 -> your php version (8.0.1) does not satisfy that requirement.
Installation failed, reverting ./composer.json and ./composer.lock to their original content.
Resolve the version and ignore the version directly
Just follow this after your composer directive
--ignore-platform-reqs
For example, I installed BarryVDH/Laravel -debugbar appeared
Originally is:
composer require barryvdh/laravel-debugbar --dev
Change to install dependencies on success
composer require barryvdh/laravel-debugbar --dev --ignore-platform-reqs