Hi,
It seems like there might be an issue with the Moodle files being uploaded to the correct directory. Make sure that the Moodle files are uploaded to the correct directory and that the directory is accessible from the center/moodle URL. If the files are in the correct directory, you may need to check the permissions of the directory and ensure that they are set correctly. Additionally, you may need to check the server logs to see if there are any errors or issues that are preventing the installation from being accessed.