diff --git a/addons/website_blog/controllers/main.py b/addons/website_blog/controllers/main.py
index 404f24906d6..52cddb8b0ad 100644
--- a/addons/website_blog/controllers/main.py
+++ b/addons/website_blog/controllers/main.py
@@ -116,7 +116,10 @@ class WebsiteBlog(http.Controller):
             step=self._blog_post_per_page,
         )
 
-        all_tags = blogs.all_tags(join=True) if not blog else blogs.all_tags().get(blog.id, request.env['blog.tag'])
+        if not blogs:
+            all_tags = request.env['blog.tag']
+        else:
+            all_tags = blogs.all_tags(join=True) if not blog else blogs.all_tags().get(blog.id, request.env['blog.tag'])
         tag_category = sorted(all_tags.mapped('category_id'), key=lambda category: category.name.upper())
         other_tags = sorted(all_tags.filtered(lambda x: not x.category_id), key=lambda tag: tag.name.upper())