form 4.9.x to 4.7.x it is possible ?? because i bought king wordpress theme but it doesnt work on 4.9.x
While it’s highly unrecommended to use outdated WordPress releases, you can most likely downgrade your current release manually with a plugin:
This looks like a problem with your PHP/server configuration, unfortuantely it has nothing to do with the theme.
Since this message seems to be coming from your hosting company, I assume they are not going to change it for you. I’d still ask them if their support covers it. Please also make sure to read about any other recommended settings for this theme, usually they’re provided in theme documentation.
Alternatively you may be interested in hiring a professional from Envato Studio.