FullCalendar plugin error "not found"

I am using the following plugin https://github.com/saade/filament-fullcalendar which when following the guide and installing it and trying to do a test it comes out as if I had not installed the library. use the following command composer require saade/filament-fullcalendar:^3.0 followed by php artisan make:filament-widget CalendarWidget but when configuring it as they say, the error shown appears

GitHub

GitHub - saade/filament-fullcalendar: The Most Popular JavaScript C...

The Most Popular JavaScript Calendar as a Filament Widget - GitHub - saade/filament-fullcalendar: The Most Popular JavaScript Calendar as a Filament Widget