HTTP ERROR 500

I have 2 question:
- I already finished upload laravel project into server, one different file auto upload after finish uploading all files..
diffrent files = "c:\xampp..." - like image above
- After finish, i try to run and get error HTTP ERROR 500
p/s i'm first time to upload laravel project to server
Requirement-
Server hosting:
OS: CentOS Linux 7.2.1511 (Core)
Plesk version: Onyx 12.5.30
PHP ver: 7.0.30
Laravel ver : 5.6
php ver: 7.1.3
I see a log folder, how about using it to read the logs?
Since its a internal server error.
@CRUORZY - @cruorzy i'm so sorry.. im still new in laravel. but i want why log folder come out like that after finish uploading project.
how to i run project laravel using plesk hosting.. can you guide me?
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