composer update not working

“Your requirements could not be resolved to an installable set of packages.

Problem 1
– laravel/pint[v1.0.0, …, v1.14.0] require ext-xml * -> it is missing from your system. Install or enable PHP’s xml extension.
– Root composer.json requires laravel/pint ^1.0 -> satisfiable by laravel/pint[v1.0.0, …, v1.14.0].
”

Stackoverflow: require ext-xml * -> it is missing from your system. Install or enable PHP’s xml extension

https://stackoverflow.com/questions/68873115/require-ext-xml-it-is-missing-from-your-system-install-or-enable-phps-xml

Solution:

sudo apt-get install php-xml

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Bonus:
No Application Encryption Key Has Been Specified
https://stackoverflow.com/questions/44839648/no-application-encryption-key-has-been-specified

php artisan key:generate
php artisan config:cache

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show hidden files:

ctrl + H => works !

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php.ini error show, log