In the past 2 weeks there have been at least 4 answers here on setting up on shared hosting, one in fact is close to this post, please search the forum. 3 of the 4 I answered myself.
As an example https://laracasts.com/discuss/channels/laravel/laravel-54-not-working-on-linux-shared-hosting
Oh and after getting everything set up correctly you have to properly resolve your paths.