Can you please help this the errors below:
Deprecated: Function xml_set_object() is deprecated since 8.4, provide a proper method callable to xml_set_*_handler() functions in /var/www/na7kr-us/sources/breadcrumbs.php on line 170

Deprecated: xml_set_element_handler() [function.xml-set-element-handler.php]: Passing non-callable strings is deprecated since 8.4 in /var/www/na7kr-us/sources/breadcrumbs.php on line 173

Deprecated: xml_set_character_data_handler() [function.xml-set-character-data-handler.php]: Passing non-callable strings is deprecated since 8.4 in /var/www/na7kr-us/sources/breadcrumbs.php on line 174
A configuration option (facebook_uid) which does not exist was referenced
A configuration option (facebook_appid) which does not exist was referenced

Hello,

The XML deprecation errors are because Composr has not yet been adjusted for PHP 8.4. Version 10 is currently in long-term release, so I am unsure if it will be fixed. But version 11 beta will be fixed for that.

The Facebook errors are probably because you do not have facebook_support installed (this is a non-bundled addon). You shouldn't need to install it unless you're going to use it, so something is not properly checking first if the addon is installed.

You can ignore the config option errors unless they are interfering with site operation.

My suggestion is to run Composr on PHP 8.3 for the time being; this is the latest version on which it has been tested.