If you receive a Fatal Error when upgrading WordPress, such as:

Fatal error: Call to undefined function self_admin_url()

This is usually due to the theme you have installed not being supported by the version of WordPress you are trying to upgrade to.

The best way to upgrade your WordPress installation is to switch to the default theme, then upgrade, and then switch back to the theme. Please contact the theme designer for support on upgrading your installation.

Was this answer helpful? 0 Users Found This Useful (0 Votes)

Most Popular Articles

Bots hitting xmlrpc.php and causing a high load

An earlier version of WordPress contained a security vulnerability that allowed posting from the...
Caching plugin for WordPress?

Since we use LiteSpeed Web Server, we recommend using the LiteSpeed Cache plugin....
Can I use the WordPress command line interface or WP-CLI?

YES! Our servers include the WordPress command line interface, also known as WP-CLI. You can...
Changed theme and now cannot access WordPress site or wp-admin

If your theme has an issue and WordPress only shows a blank (white) page and you need to change...
High resource usage from /wp-admin/admin-ajax.php

The WordPress Heartbeat API could most likely be responsible for high-end resource usage in...