Your requirements could not be resolved

 

Problem 1
    - laravel/framework[v6.20.26, ..., 6.x-dev] require league/flysystem ^1.1 -> satisfiable by league/flysystem[1.1.0, ..., 1.x-dev].
    - league/flysystem[1.1.0, ..., 1.x-dev] require ext-fileinfo * -> it is missing from your system. Install or enable PHP's fileinfo extension.
    - Root composer.json requires laravel/framework ^6.20.26 -> satisfiable by laravel/framework[v6.20.26, v6.20.27, 6.x-dev].

To enable extensions, verify that they are enabled in your .ini files:
    - /www/server/php/73/etc/php.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Notice the bold red letters in the above figure

it is missing from your system. Install or enable PHP's fileinfo extension.

 

It means lack of fileinfo   This extension

At this point, we only need to install the corresponding version of php Expand , And open

restart php  This is the perfect solution