Staff replied SP Page Builder

Class "JFormFieldPredefinedList" not found

Asked by Dominik 3 years ago Last activity 3 years ago

Hi there

When I try to open SP Page Builder on my site, I get the following error message:

Can you help me please? I would like to upgrade the site to Joomla 4.

Greetings Domi

4 replies

Toufiq Senior Staff

3 years ago

Hi there,

I appreciate you reaching out. I sincerely apologize for this oversight. I am not able to login administrator area. Can you help me?

-Thanks

Dominik Asked this

3 years ago

I can't do that anymore either. What does this error mean exactly?

Thank you

Paul Frankowski Senior Staff

3 years ago · edited

Hi Dominik,

Probably one of installed extension made that mess.
It could be extra installed by you plugin, this is common reason. Or Joomla installation was damaged by extra files.

Anyway to see more than a single error message:

Use FTP Tool
Open configuration.php file in edit mode
Turn on debug mode
And showing errors rename from "default" to maximum

Video guide for Joomla Beginners >> https://youtu.be/0W6ZqrbbkbU?feature=shared&t=155

Also check error logs in cPanel.

I hope you have website backup (or hosting company has)

Paul Frankowski Senior Staff

3 years ago

BTW

On forum.joomla.org I also found that suggestion (it doesn't have to be true in your case)

This is error is thrown by a corrupted J! website. It it is possible that you have parts of J! 4.x in your website left over from failed attempts to update from J! 3.10 to J! 4.x that you need to cleanse. I suggest that you try to restore your J! 3.10.11 website properly: https://forum.joomla.org/viewtopic.php?f=812&t=995470#p3667508