After installation, when I try to access the route [APP_URL]/api-tester, I get the attached error. I'm using PHP 7.2 with Laravel 5.6 <img width="1435" alt="Screenshot 2019-12-01 at 3 55 48 PM" src="https://user-images.githubusercontent.com/20708833/69915771-19728c80-1453-11ea-836c-cb718c7902e8.png">
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