The plugin is not wp 6.7 compatible. Textdomain is loaded to soon. Please turn on wp debug mode and view any page. You will see the issue.
Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the slim-seo
domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init
action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/public_html/wp-includes/functions.php on line 6114
Can you fix this as the error logs get flooded by this.
more info to be found here https://make.projectdmc.org/core/2024/10/21/i18n-improvements-6-7/
Thank you.