Laravel Project, 500 internal server error

I developed a simple application in laravel (5.6) everything works fine on my PC (windows 10/ Xamp / PHP 7.1). but when i upload the same project to a VPS running Cent OS it gives

with PHP 5.6 (which is expected)

Parse error: syntax error, unexpected '?' in /home/clarionit/public_html/ambience/c/vendor/laravel/framework/src/Illuminate/Foundation/helpers.php on line 233

with PHP 7.0 / 7.1 / 7.2

500, Internal server error.

What I have done so far?

• Permissions for all files and folders are set to 777 (to see if that is a problem)
• Replacing index.php code with something simpler like phpinfo() works perfectly.

Ask for any more information needed, Please tell me what can be causing the 500, internal server error.

from Newest questions tagged laravel-5 - Stack Overflow http://ift.tt/2HLKGBu
via IFTTT