Strange forward slash in 'clean' Laravel project

I was developing as usual on my Laravel project tweaking with the Queue driver settings in my .env file, when all of a sudden a random forward slash appeared at the top of my project which caused some random issues. I've cleared all cache's, routes, views etc but I am still getting the strange forward slash. I even get it in the console when I run a command.

Every page:

I assume its some kind of strange bug in Laravel. Hopefully someone can tell me whats the issue. Thanks in advance.

via Chebli Mohamed