diff --git a/addons/website_slides/controllers/main.py b/addons/website_slides/controllers/main.py
index 2385bf60d21..fb972988dc6 100644
--- a/addons/website_slides/controllers/main.py
+++ b/addons/website_slides/controllers/main.py
@@ -460,7 +460,7 @@ class WebsiteSlides(WebsiteProfile):
     @http.route(['/slides/channel/join'], type='json', auth='public', website=True)
     def slide_channel_join(self, channel_id):
         if request.website.is_public_user():
-            return {'error': 'public_user'}
+            return {'error': 'public_user', 'error_signup_allowed': request.env['res.users'].sudo()._get_signup_invitation_scope() == 'b2c'}
         success = request.env['slide.channel'].browse(channel_id).action_add_member()
         if not success:
             return {'error': 'join_done'}
@@ -586,7 +586,7 @@ class WebsiteSlides(WebsiteProfile):
     @http.route('/slides/slide/like', type='json', auth="public", website=True)
     def slide_like(self, slide_id, upvote):
         if request.website.is_public_user():
-            return {'error': 'public_user'}
+            return {'error': 'public_user', 'error_signup_allowed': request.env['res.users'].sudo()._get_signup_invitation_scope() == 'b2c'}
         slide_partners = request.env['slide.slide.partner'].sudo().search([
             ('slide_id', '=', slide_id),
             ('partner_id', '=', request.env.user.partner_id.id)
diff --git a/addons/website_slides/static/src/js/slides_course_join.js b/addons/website_slides/static/src/js/slides_course_join.js
index 492229e6769..278d9c4672f 100644
--- a/addons/website_slides/static/src/js/slides_course_join.js
+++ b/addons/website_slides/static/src/js/slides_course_join.js
@@ -54,7 +54,12 @@ var CourseJoinWidget = Widget.extend({
                 location.reload();
             } else {
                 if (data.error === 'public_user') {
-                    self._popoverAlert(self.$el, _.str.sprintf(_t('Please <a href="/web/login?redirect=%s">login</a> to join this course.'), (document.URL)));
+                    var message = _t('Please <a href="/web/login?redirect=%s">login</a> to join this course');
+                    var signupAllowed = data.error_signup_allowed || false;
+                    if (signupAllowed) {
+                        message = _t('Please <a href="/web/signup?redirect=%s">create an account</a> to join this course');
+                    }
+                    self._popoverAlert(self.$el, _.str.sprintf(message, (document.URL)));
                 } else if (data.error === 'join_done') {
                     self._popoverAlert(self.$el, _t('You have already joined this channel'));
                 } else {
diff --git a/addons/website_slides/static/src/js/slides_slide_like.js b/addons/website_slides/static/src/js/slides_slide_like.js
index 22d96d87353..9123df740d3 100644
--- a/addons/website_slides/static/src/js/slides_slide_like.js
+++ b/addons/website_slides/static/src/js/slides_slide_like.js
@@ -56,7 +56,12 @@ var SlideLikeWidget = Widget.extend({
                 self.$el.find('span.o_wslides_js_slide_like_down span').text(data.dislikes);
             } else {
                 if (data.error === 'public_user') {
-                    self._popoverAlert(self.$el, _.str.sprintf(_t('Please <a href="/web/login?redirect=%s">login</a> to vote this lesson'), (document.URL)));
+                    var message = _t('Please <a href="/web/login?redirect=%s">login</a> to vote this lesson');
+                    var signupAllowed = data.error_signup_allowed || false;
+                    if (signupAllowed) {
+                        message = _t('Please <a href="/web/signup?redirect=%s">create an account</a> to vote this lesson');
+                    }
+                    self._popoverAlert(self.$el, _.str.sprintf(message, (document.URL)));
                 } else if (data.error === 'vote_done') {
                     self._popoverAlert(self.$el, _t('You have already voted for this lesson'));
                 } else if (data.error === 'slide_access') {