composer dump-autoload fails after provider and aliases added to config file.

[gtshift-dev]

Hi, i am trying to install this package with my Laravel 5.7 project. After successfull installation via composer and adding provider and aliases to config file,

php artisan vendor:publish --provider="Teepluss\Theme\ThemeServiceProvider"

this command fails.
i replaced fire() with handle() in ThemeGeneratorCommand.php, but still getting error.

Please help me, i am stuck with it.