Laravel clearing config causing wierd X to show up

I'm currently using laravel 5.8 in a project and stumbled on a weird problem, after lanching the commande optimize:clear a Wierd Caracheter will show up when executing any other commande and also causing ajax requests to fail here is an example of the problem

this happening in all the team machines, not just mine. the second problem reloading a page, every time We load a page we see this screen before it redirected to the actual view

the only found solution is to run the commande Artisan config:cache

via Chebli Mohamed