Why Laravel do not works

I've got a little problem, I can not run Laravel on my Mac OS X (the version of my Laravel is 5.4 PHP 7.3 and the error appears below.

(3/3) ErrorException
compact(): Undefined variable: operator (View: /Users/marques/Sites/barramento/resources/views/layouts/template.blade.php) (View: /Users/marques/Sites/barramento/resources/views/layouts/template.blade.php)

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