Laravel – "Your requirement could not be resolved to an installable set of packages"

The problem is caused by the lack of the fileinfo extension.

In new versions of PHP, this extension is bundled with installation, but on Windows devices, you must enable this extension inside your php.ini configuration file.

Open the file php.ini file in the directory (C:Program Filesphp-8.3.4php.ini) and look for the line that looks like this:

;extension=fileinfo

Remove the semicolon so that it becomes like this:

extension=fileinfo

And that’s it, everything should start working normally. In case you get other error messages about missing extensions, just look for them inside your php.ini file and uncomment them, for example, if you get an error message about a missing pdo_sqlite extension then open the php.ini file and remove the comment to enable it:

extension=pdo_sqlite

Note for future readers: You can get the path of the php.ini file being used by running the command php --ini in your terminal, it will tell you the exact location of the file. Here’s an example:

php --ini
Configuration File (php.ini) Path: /etc/php/8.2/cli
Loaded Configuration File:         /etc/php/8.2/cli/php.ini
Scan for additional .ini files in: /etc/php/8.2/cli/conf.d