Help with Wordpress 3.4 Upgrade

I tried automatically upgrading my website to Wordpress 3.4 and got the following error messages.

When I try to access wp-admin:

Fatal error: Class 'WP_Theme' not found in /home/bglhonl1/public_html/wp-includes/[url removed, login to view] on line 106

When I try to access my front page:

Fatal error: Call to undefined function get_front_page_template() in /home/bglhonl1/public_html/wp-includes/[url removed, login to view] on line 26

I tried uploading the Wordpress 3.4 files manually to my server and I kept getting the error messages.

I deleted my Quick Cache plugin and still got the error messages.

I tried going back to the Wordpress 3.3.1 but the files didn't upload to my server.

I am SO upset right now. Very frustrated. Need someone who can work quickly and communicate well.

Taidot: WordPress

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Tietoa työnantajasta:
( 5 arvostelua ) Oak Park, United States

Projektin tunnus: #1696257