Title: Fatal Error while Upgrading to WordPress 3.4 Last modified: August 20, 2016 --- # Fatal Error while Upgrading to WordPress 3.4 * Resolved [vdrive](https://wordpress.org/support/users/vdrive/) * (@vdrive) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/) * Hello, I tried upgrading to WordPress 3.4 a while ago, but I got an error which I can’t remember. However, when I tried to visit my site (visitor’s mode), I got the error below: * `Fatal error: Call to undefined function get_front_page_template() in /home/oluwatob/ public_html/wp-includes/template-loader.php on line 26` * On the other hand, while trying to visit my Dashboard, it takes me to a pae asking me to Update WordPress Database. After clicking Update button, I get this error: * `Fatal error: Class 'WP_Theme' not found in /home/oluwatob/public_html/wp-includes/ theme.php on line 106` * I have tried all I can but to no avail. Please, how can I solve this error. * Thanks in anticipation of your QUICK RESPONSE. Viewing 13 replies - 1 through 13 (of 13 total) * Moderator [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/) * (@ipstenu) * 🏳️‍🌈 Advisor and Activist * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813786) * What did you try? 🙂 I know you said ‘All I can’ but what is that? Can you list what you tried? That way we don’t make you repeat what you’ve done. * Thread Starter [vdrive](https://wordpress.org/support/users/vdrive/) * (@vdrive) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813798) * I tried renaming the theme folder. Later on, I tried renaming the plugins folder and even the active theme itself; yet it didn’t work. That’s all I’ve tried for now :). * Thanks as you help me look into this. * Moderator [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/) * (@ipstenu) * 🏳️‍🌈 Advisor and Activist * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813800) * Okay first up try manually upgrading WP. Go to [http://wordpress.org/download/](http://wordpress.org/download/) and get the latest version (3.4), download it to your computer, unzip, and FTP the files up. * Thread Starter [vdrive](https://wordpress.org/support/users/vdrive/) * (@vdrive) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813812) * But, won’t I loose all my posts and other files? Just being curious and careful. * Moderator [Jan Dembowski](https://wordpress.org/support/users/jdembowski/) * (@jdembowski) * Forum Moderator and Brute Squad * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813827) * > But, won’t I loose all my posts and other files? Just being curious and careful. * Careful is good. 😉 But don’t worry, your fine. * Your posts are in the database (safe) and your files are not in the WordPress ZIP file. Don’t delete files, just upload from that zip on top of what’s there. * Since you are being careful, make a complete backup of your files and database. * [http://codex.wordpress.org/WordPress_Backups](http://codex.wordpress.org/WordPress_Backups) [http://codex.wordpress.org/Backing_Up_Your_Database](http://codex.wordpress.org/Backing_Up_Your_Database) [http://codex.wordpress.org/Restoring_Your_Database_From_Backup](http://codex.wordpress.org/Restoring_Your_Database_From_Backup) * Backups are your friend. Put those somewhere safe and you should them good to go in case something bad happens. * Thread Starter [vdrive](https://wordpress.org/support/users/vdrive/) * (@vdrive) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813831) * Thanks so much, I’ve started uploading the WordPress 3.4 via FTP and overwriting existing files. Thanks. I’ll update about the progress. * Thread Starter [vdrive](https://wordpress.org/support/users/vdrive/) * (@vdrive) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813840) * Waoh…after upload, I followed the Update procedure and got a successful notice. Yipeee!!! My Site is now back online though, I had to perform some quick set up like activating a theme, placing the widgets appropriately and others. Thanks so much for your help. You Rock!!! * You can check the site here: [http://www.oluwatobisoyombo.com](http://www.oluwatobisoyombo.com) * Thanks once again * [bglhonl1](https://wordpress.org/support/users/bglhonl1/) * (@bglhonl1) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813977) * So, I tried the manual upload and my site STILL shows the error message: * Fatal error: Class ‘WP_Theme’ not found in * I’m pretty frustrated at this point. I have Theme TwentyTen and TwentyEleven and I also use the DB Cache Plugin so I don’t know if that means anything. But yeh, I have no clue how to get my site working again. * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813978) * 1. Don’t post in someone else’s resolved topic. * 2. Did you read [http://wordpress.org/support/topic/troubleshooting-wordpress-34-master-list](http://wordpress.org/support/topic/troubleshooting-wordpress-34-master-list)– specifically: * > Problem: You get the following error — Fatal error: Class ‘WP_Theme’ not found > in > Solution: Reinstall WP. The class-wp-theme.php file is included by default. > This could only really happen if they get an updated wp-includes/theme.php > file but not an updated wp-settings.php file. (Do the manual upgrade if you > can’t get into wp-admin) * Follow the instructions for a [manual upgrade](http://codex.wordpress.org/Upgrading_WordPress#Manual_Update). * [bglhonl1](https://wordpress.org/support/users/bglhonl1/) * (@bglhonl1) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2813981) * You know what… at this point I’m posting this as a project on Freelancer.com. I don’t have time for this. * And yes, I did read the master list thread and didn’t find anything helpful. * I love WordPress and all, but they have a long way to go when it comes to quick and efficient troubleshooting. * [islandman974](https://wordpress.org/support/users/islandman974/) * (@islandman974) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2814004) * Sorry but not resolved at all… I tried all what you said above..but nothing of nothing… * Please, we need more help Regards… * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2814006) * [@islandman974](https://wordpress.org/support/users/islandman974/): Please post your own topic. * Moderator [Jan Dembowski](https://wordpress.org/support/users/jdembowski/) * (@jdembowski) * Forum Moderator and Brute Squad * [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2814008) * > Sorry > but not resolved at all. * Yes it is _because the original poster said it is_. This was his issue and not yours. * Please open your own thread. * [http://wordpress.org/support/forum/how-to-and-troubleshooting#postform](http://wordpress.org/support/forum/how-to-and-troubleshooting#postform) Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Fatal Error while Upgrading to WordPress 3.4’ is closed to new replies. * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 13 replies * 6 participants * Last reply from: [Jan Dembowski](https://wordpress.org/support/users/jdembowski/) * Last activity: [13 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-while-upgrading-to-wordpress-34/#post-2814008) * Status: resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics