1. For the customizer and logo issue, please try to disable WP Super Cache plugin just for a while and see the result. Also, about this issue, may i know if you can’t access customizer panel or your changes on the customizer doesn’t occur on the frontend website?
2. For the social login and registration issue, is there any error message occurs? or please try to re-upload the plugin file manually. You can find the plugin file on themes folder wp-content/themes/jnews/plugins/