fixed validation_layout in pages

Author: AnnMarieW

dash/dash.py

@@ -2075,20 +2075,21 @@ def update(pathname, search):
             _validate.validate_registry(_pages.PAGE_REGISTRY)
 
             # Set validation_layout
-            self.validation_layout = html.Div(
-                [
-                    page["layout"]() if callable(page["layout"]) else page["layout"]
-                    for page in _pages.PAGE_REGISTRY.values()
-                ]
-                + [
-                    # pylint: disable=not-callable
-                    self.layout()
-                    if callable(self.layout)
-                    else self.layout
-                ]
-            )
-            if _ID_CONTENT not in self.validation_layout:
-                raise Exception("`dash.page_container` not found in the layout")
+            if not self.config.suppress_callback_exceptions:
+                self.validation_layout = html.Div(
+                    [
+                        page["layout"]() if callable(page["layout"]) else page["layout"]
+                        for page in _pages.PAGE_REGISTRY.values()
+                    ]
+                    + [
+                        # pylint: disable=not-callable
+                        self.layout()
+                        if callable(self.layout)
+                        else self.layout
+                    ]
+                )
+                if _ID_CONTENT not in self.validation_layout:
+                    raise Exception("`dash.page_container` not found in the layout")
 
             # Update the page title on page navigation
             self.clientside_callback(