I am in the same boat. Clicked to upgrade got a blank screen. Clicked my back button and now my admin screen is blank and I get this error on my webpage:
Fatal error: Call to undefined function is_multisite() in /home/mhp/public_html/wp-includes/default-constants.php on line 20
Me too!
I’m very new to WordPress and having some issues.
I’ve created an account with Bluehost for my one domain and activated wordpress. I wanted to start using child themes so tried the ‘one-click child theme plugin’ but when I activated it, I then got a blank page as my domain, my one page site had disappeared. I didn’t know how to fix so I have re-installed wordpress via the bluehost panel, is that ok? I’ve chosen a theme, but the live page is still blank.
I’ve been looking through the forums but as I’m so new I’m having trouble finding my way through it all. Can anyone advise?
My plugins are not activated. My domain is http://www.stormtempweb.com. I’m currently using the ‘Atahualpa’ theme. It says all my themes are updated.
Hoping someone can enlighten us all and fast!
Try:
– switching to the Twenty Eleven theme by renaming your current theme’s folder inside wp-content/themes and adding “-old” to the end of the folder name using FTP or whatever file management application your host provides.
– resetting the plugins folder by FTP or phpMyAdmin.
– re-uploading all files & folders – except the wp-content folder – from a fresh download of WordPress.
– running the upgrade manually via wp-admin/upgrade.php
Here is an article from Bluehost on how to do this with their system:
https://my.bluehost.com/cgi/help/571
I hope that helps.
Thank you so much Esmi, that worked perfectly 😉
So was it a plugin that was causing the problems? I wonder if it was the ‘one-click child theme’ I tried to use.
I would hate for this to keep happening, as I’m guessing using plugins with WordPress is a bit of a must.
Thanks so much for the fix 😉
Thread Starter
whimc
(@whimc)
I’ve discovered it’s my “Shopp” plugin which is MY STORE! What to do?
Login with your shopplugin.net account on the Shopp support site: https://shopplugin.net/support/ and open a ticket with the support team. They’re pretty responsive. Right now it’s showing same-day support.
You can get a new copy of the Shopp plugin or find a different plugin to accomplish what you need. This can happen because a plugin isn’t compatible with your wordpress version, or the plugin itself that you have could be corrupted.
