v3 Custom Error Page

Hi there,

the simplest method is to use a plugin like this:

https://en-gb.wordpress.org/plugins/404page/

Without a plugin would require custom development

If you’re fine with with writing your own code then you can use the generate_do_template_part hook. Tom provides an example of that code here:

https://generatepress.com/forums/topic/question-about-gp-3-0-and-generate_do_template_part/#post-1429909

The difference being the conditional template tag of is_home() would need to be: is_404()

You’re welcome