PHP MySQL extension is not enabled on the server.
Hosting installs default items that break setup.
No space left for files during or after installation.
Installation fails due to rewrite or permissions issues.
Installer completes but redirects to wrong domain.
Error during multisite setup or rewrite rules.
Unable to update settings in configuration file.
Output occurs before installation begins.
Softaculous or other auto-install tools error out.
Installer fails because the database is not empty.
Blank screen after installation or theme/plugin activation.
Internal server error appears mid-installation.
Installer page refreshes continuously due to forced HTTPS.
Installation times out due to server restrictions.
WordPress is installed in a conflicting directory.
Files or folders are not accessible during installation.
Server’s PHP version not supported by WordPress.
Installer cannot find the wp-config.php file to proceed.
The WordPress installer stops mid-process without completing.
WordPress can’t connect to the database.