HELP! Can't Customize Moesia Theme

I just installed the moesia-demo.xml file with the wordpress installer and now I can’t customize the theme. It gives me the following error:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Hi,

Regarding theme installation, you should consult our documentation https://athemes.com/documentation/moesia/. You have to install required plugins, and to import settings file for types plugin. Also, please share your page link with us when asking questions.

Regarding error, as instructed, you have to contact hosting service support.

Best Regards