Setup Problem

Your softwareMautic 4.2.1
My PHP version is :7.4
My MySQL/MariaDB version is (delete as applicable): MySQL 5.7

Updating/Installing Errors
Hi. I have a problem installing Mautic. I uploaded the data to the server on a subdomain. I’ve already spoken to the hoster’s support actually all the requirements are met. However, Mautic cannot be reached. Error message: The site is currently offline due to encountering an error. If the problem persists, please contact the system administrator.
System administrators, check server logs for errors.

Do you have a tip for me?