Before anything else, let's make sure this server can actually run the app.
pdo_mysql is installed
openssl is installed
mbstring is installed
tokenizer is installed
ctype is installed
json is installed
fileinfo is installed
curl is installed
dom is installed
xml is installed
storage/ is writable
storage/framework/ is writable
storage/framework/cache/ is writable
storage/framework/sessions/ is writable
storage/framework/views/ is writable
storage/logs/ is writable
bootstrap/cache/ is writable
.env is writable/creatable