Jeremy Blur

Hi,
I read most of the ticket regarding the install, and I'm surprised that looks like no one else got this problem.
When I install the app in my local xampp, I have error with ROOT_DIR
My php version :PHP Version 7.2.12
And after that, I don't have any admin access (I have to creation directly via phpmyadmin), but I have some errors in the script after. Looks like the install is not finished.
User Meta Table created.
Message Meta Table created.
Messages Table created.
Subjects Table created.
Notes Table created.
Notes Table created.
Options Table created.
Users Table created.
Options Table created.
Website Labels Created.
Warning: Use of undefined constant ROOT_DIR - assumed 'ROOT_DIR' (this will throw an Error in a future version of PHP) in C:\xampp2\htdocs\test\admin\lib\classes\labels.php on line 20
Warning: require(ROOT_DIR/lib/includes/english.php): failed to open stream: No such file or directory in C:\xampp2\htdocs\test\admin\lib\classes\labels.php on line 20
Fatal error: require(): Failed opening required 'ROOT_DIR/lib/includes/english.php' (include_path='C:\xampp2\php\PEAR') in C:\xampp2\htdocs\test\admin\lib\classes\labels.php on line 20
Thank you for the help