local.ERROR: file_put_contents(/var/www/laravel/storage/framework/cache/data/ac/13/ac1346822aa47576e6930144a7f0c0d296a1f95f): failed to open stream: Permission denied {"exception":"[object] (ErrorException(code: 0): file_put_contents(/var/www/laravel/storage/framework/cache/data/ac/13/ac1346822aa47576e6930144a7f0c0d296a1f95f): failed to open stream: Permission denied at /var/www/laravel/vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:187)

echo "deb http://ftp.debian.org/debian buster-backports main" >> /etc/apt/sources.list

apt update

Err:4 http://ftp.debian.org/debian buster-backports InRelease

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 648ACFD622F3D138

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0E98404D386FA1D9

Uncaught (in promise) Error: spawn powershell ENOENT

Add %SystemRoot%\system32\WindowsPowerShell\v1.0 to your PATH Variable,

 

cmd+q and search env and hit enter

click environment variables in the advanced tab

find Path/PATH variable and click edit

Click new and paste %SystemRoot%/system32/WindowsPowerShell/v1.0

click ok and restart your terminal and try installing again