Steps to reproduce the issue

clone the 5.4-dev
install from cli

Expected result

no warning

Actual result

`
Install Joomla

Checking system requirements...OK
Collecting configuration...OK
Validating DB connection...OK
Creating and populating the database...OK
Writing configuration.php and additional setup ...
Warning: simplexml_load_file(): I/O warning : failed to load external entity "/var/www/html/modules/mod_custom/mod_custom.xml" in /var/www/html/libraries/src/Installer/Installer.php on line 2080

Warning: Trying to access array offset on false in /var/www/html/libraries/src/Installer/Adapter/ModuleAdapter.php on line 421

Warning: Trying to access array offset on false in /var/www/html/libraries/src/Installer/Adapter/ModuleAdapter.php on line 422
OK

[OK] Joomla has been installed
`

System information (as much as possible)

php 8.4

Additional comments