John Havlik

This one is a bit confusing, that line was not changed in 7.3.1. Additionally, it doesn’t look like the French translation has been updated recently either https://translate.wordpress.org/projects/wp-plugins/breadcrumb-navxt/stable/fr/default/?filters%5Bterm%5D=Go+to+the+first+page+of+search+results+for+%25title%25.&filters%5Bterm_scope%5D=scope_any&filters%5Bstatus%5D=current_or_waiting_or_fuzzy_or_untranslated&filters%5Buser_login%5D=&filter=Apply+Filters&sort%5Bby%5D=priority&sort%5Bhow%5D=desc

Lastly, I’m not seeing anything in the French translation for the string on the line of the error that should cause a problem (or is even different from the original English or Spanish translation (which I test against locally)). I’m not sure if there is something specific with the server setup (if it is a specific PHP version that causes it), or something I’m missing here.

Can you all check if line 124 of class.bcn_breadcrumb_trail.php is the same as this: https://plugins.trac.wordpress.org/browser/breadcrumb-navxt/tags/7.3.1/class.bcn_breadcrumb_trail.php#L124

Based on the error, this is due to an extension plugin to Breadcrumb NavXT not being compatible with Breadcrumb NavXT 7.3.0. There may be a newer version of the extension which needed to be installed before updating Breadcrumb NavXT. Please open a support ticket where you got the extension plugin from (this forum is only for support of Breadcrumb NavXT itselft, I can’t provide support for extension to it here).

Double check your Breadcrumb NavXT settings to make sure that the product category taxonomy type is set as the “Hierarchy” for the product post type. Sometimes, the default hierarchy that is selected ends up not being the one you want.

My guess is this issue is caused by a secondary loop running before Breadcrumb NavXT. Normally a secondary loop isn’t a problem, but if that loop modifies the main WP_Query object/affects the state of global variables such as $post you will get unexpected behavior.

One thing you could try is in the Breadcrumb NavXT settings, if you check the setting “link the current item” and then save changes, where does the “breadcrumb” breadcrumb link to? Is it the actual current page, or some other page?

How are you calling the breadcrumb trail? Breadcrumb NavXT has no known issues with tag archives. However, if the breadcrumb trail is not called on the tag/term archive page, it won’t be displayed.

Simply activating Breadcrumb NavXT will not cause a breadcrumb trail to appear on your website (unless your theme already supports Breadcrumb NavXT). You will need to call the breadcrumb trail using one of the supported methods (placing a call to bcn_display() in one of your theme’s php files, see https://mtekk.us/archives/guides/calling-the-breadcrumb-trail/), using the included Breadcrumb Trail Block (either in your posts/pages or if you have a block theme, in the theme editor), or using the included widget.

Whatever is registering the pp_category_tag taxonomy, isn’t doing it early enough, it’s likely if you visit the Breadcrumb NavXT settings page you’re going to get a warning message about that taxonomy not getting registered properly. Breadcrumb NavXT requires that your taxonomies and CPTs are registered before the init action at level 9000 (default is 10 for the init action and would happen much sooner).