Unfortunately it sounds like Joomla isn't able to find all of its required files for loading. How did you go about installing this particular copy of Joomla? As a test I went ahead and did an installation on your domain using the Softaculous installer available in cPanel and it installed it without any errors.
You can check out our instructions for installing an application via Softaculous here:
How to install with Softaculous
Alternatively let us know how you installed the current copy of Joomla that you're having issues with and hopefully we can assist you in troubleshooting what might be missing.
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