Reescreva http para https no banco de dados do WordPress

UPDATE wp_options SET option_value = replace(option_value, 'http://www.website', 'https://www.website') WHERE option_name = 'home' OR option_name = 'siteurl';



UPDATE wp_posts SET guid = replace(guid, 'http://www.website','https://www.website');



UPDATE wp_posts SET post_content = replace(post_content, 'http://www.website', 'https://www.website');



UPDATE wp_postmeta SET meta_value = replace(meta_value,'http://www.website','https://www.website');