diff --git a/web_field_required_invisible_manager/models/models.py b/web_field_required_invisible_manager/models/models.py
index fa101ac0e..8594a23a0 100644
--- a/web_field_required_invisible_manager/models/models.py
+++ b/web_field_required_invisible_manager/models/models.py
@@ -52,7 +52,7 @@ class Base(models.AbstractModel):
         return arch
 
     def process_child_fields(self, arch, view_type):
-        """Collect all relational fields and update its views"""
+        """Collect all relational fields and update their views"""
         related_fields = [
             (k, v.comodel_name) for k, v in self._fields.items() if v.comodel_name
         ]
@@ -80,7 +80,8 @@ class Base(models.AbstractModel):
                         z_arch = self.create_restrictions_fields(
                             restr, view_type, z_arch
                         )
-                        z_arch["arch"] = z_arch["arch"].decode("utf-8")
+                        if type(z_arch["arch"]) is bytes:
+                            z_arch["arch"] = z_arch["arch"].decode("utf-8")
                         name_manager = NameManager(False, self.env[restr.model_name])
                         if restr.readonly_field_id and restr.readonly_model_id:
                             model_field_infos = name_manager.fields_get.get(
diff --git a/web_field_required_invisible_manager/tests/test_web_field_required_invisible_manager.py b/web_field_required_invisible_manager/tests/test_web_field_required_invisible_manager.py
index 6800a1e09..b4f6215a6 100644
--- a/web_field_required_invisible_manager/tests/test_web_field_required_invisible_manager.py
+++ b/web_field_required_invisible_manager/tests/test_web_field_required_invisible_manager.py
@@ -121,6 +121,7 @@ class TestFieldRequiredIvisibleManager(common.SavepointCase):
                 "<field name='name'/></tree>",
             }
         )
+        cls.view_users_form_arch_orig = cls.view_users_form.arch
         cls.view_users_form.arch = cls.view_users_form.arch.replace(
             "</notebook>",
             "</notebook><field name='company_ids'><tree><field name='city'/>"
@@ -220,3 +221,11 @@ class TestFieldRequiredIvisibleManager(common.SavepointCase):
         self.assertTrue(self.invisible_title_rec_id.required)
         # unlink
         self.invisible_rec_id.unlink()
+        # case when child view has no fields
+        self.view_users_form.arch = self.view_users_form_arch_orig
+        self.view_users_form.arch = self.view_users_form.arch.replace(
+            "</notebook>",
+            "</notebook><field name='company_ids'><form><br/></form></field>",
+        )
+        self.env.user.fields_view_get(view_id=self.view_users_form.id, view_type="form")
+        self.env.user.fields_view_get(view_id=self.view_users_tree.id, view_type="tree")