imithemes

Hosting found it was in fact a problem with the mod_security. Thank you so much for your time and providing top sypport.

Thanks. Will be notifying user about it and get back to you with the outcome.

To access widgets page I disabled ‘Widgets Bundle’ plugin and there are no widgets in any of the available 3 sidebars. Activated ‘Widgets Bundle’ plugin again and the 404 error is here again.

No change. I just did it but the problem persists.

Here it is https://a.cl.ly/5zuK6WJN

I don’t see any error in the console https://a.cl.ly/geu7N8kg

I have a test website available where I have the Twenty Sixteen theme active with SiteOrigins Builder, Widgets Bundle and Classic Widgets plugins active. The customizer and widgets page under Appearance menu throws 404 error. Would you like to test it yourself?

With Twenty Nineteen theme, SiteOrigins Builder, Widgets Bundle and Classic Widgets plugins active the error persists. When I deactivate ‘Classic Widgets’ plugin the widgets page starts working but the Customizer page still show 404 error. I tested this with Health & Troubleshoot plugin with WP_DEBUG log set to True but there is no error in the log.

Looks like there is some connection with the ‘Classic Widgets’ plugin. When I disable it and keep the SiteOrigins Widgets Bundle active then I can access widgets page in block editor view but the Customizer page still show 404 error, it only work when I disable SiteOrigins Widgets Builder plugin.

Yes, removing the source from the conditional array is ok and self hosted plugins works well. I appreciate your assistance.

Thanks for the information. It seems to be working by overriding all the default plugins in the conditional demo.
I do have question though, is it necessary to define the source of the plugin in both default and conditional array?

Thanks for getting back on this. Yes, I am using the correct plugin hook for the demo specific required plugins as shown here:

if (
    isset( $_GET['step'] ) &&
    $_GET['step'] === 'import' &&
    isset( $_GET['import'] )
  ) {
	// Adding one additional plugin for the first demo import ('import' number = 0).
    if ( $_GET['import'] === '0' ) {

But it always display message ‘Plugin not found’. I believe it search for the hosted plugin on the WP repository.