I had a similar issue when I was trying to install Laravel on my server first time. Turned out I was installing in the wrong folder and the correct folder was public_html which is the default installation folder on the platform, Cloudways, I am using.
Yes I also feel the problem related to Plesk installation. And from this magnificent website I get my answers. If you need best web hosting service then coupons and promocodes are sufficient to save your pocket.
you will had to change route in httpd file also check this link https://conetix.com.au/blog/installing-laravel-4-plesk-12/
had successfully install laravel on shared hosting also u can check this site srvllp.com
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