Fatal Error upon 1st time install and activation (vsn 2.3.1)

I’m getting the following error immediately upon activating Enfold on my fresh install of WordPress.

Admin Area
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Fatal error: Call to undefined function wp_get_theme() in /home/optinfun/public_html/jv/wp-content/themes/enfold/framework/php/auto-updates/auto-updates.php on line 137

Front End
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Warning: Missing argument 1 for get_post(), called in /home/optinfun/public_html/jv/wp-content/themes/enfold/framework/php/function-set-avia-frontend.php on line 128 and defined in /home/optinfun/public_html/jv/wp-includes/post.php on line 371

Warning: Missing argument 1 for get_post(), called in /home/optinfun/public_html/jv/wp-content/themes/enfold/framework/php/function-set-avia-frontend.php on line 128 and defined in /home/optinfun/public_html/jv/wp-includes/post.php on line 371

Fatal error: Call to undefined function wp_get_theme() in /home/optinfun/public_html/jv/wp-content/themes/enfold/framework/php/function-set-avia-frontend.php on line 1177

Any pointers?

Thx