The message is that "Cpanel softaculous" is something closed which is offered by your hosting provider. We here in the community have no access to it. Since you have already invested on this hosting provider/package you might want to try their support first. If it is not going anywhere, then you have to start from the beginning at https://docs.moodle.org/en/Installation.
Installing and upgrading help
moodle 3.7 installation problem
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