espo 5.9.4 install issue

[item]

Hello,

i try to install fresh 5.9.4 .. but receive :
Fatal error: Cannot declare class SystemHelper, because the name is already in use in /install/core/SystemHelper.php on line 30

Strange, before same error was end line 257.. so begin or end of the class

php version 7.4.11
mysql 8.0.21
apache 2.4.46

Any Help ?

[item]

Resolved :

comment : //require_once('install/core/SystemHelper.php');
on /install/core/installer.php. on line 86