diff --git a/src/pyj/read_book/paged_mode.pyj b/src/pyj/read_book/paged_mode.pyj
index e23548fb07..a7135a5758 100644
--- a/src/pyj/read_book/paged_mode.pyj
+++ b/src/pyj/read_book/paged_mode.pyj
@@ -662,6 +662,6 @@ def auto_scroll_action(action):
     if action is 'toggle':
         get_boss().send_message('error', title=_('No auto scroll in paged mode'), msg=_(
             'Switch to flow mode (Viewer preferences->Page layout) to enable auto'
-            ' scrolling')
+            ' scrolling'), is_non_critical=True
         )
     return False
diff --git a/src/pyj/read_book/view.pyj b/src/pyj/read_book/view.pyj
index cd564fc6cb..bc2b86a180 100644
--- a/src/pyj/read_book/view.pyj
+++ b/src/pyj/read_book/view.pyj
@@ -578,7 +578,11 @@ class View:
             self.show_spine_item_stage2(data)
 
     def on_iframe_error(self, data):
-        ui_operations.show_error((data.title or _('There was an error processing the book')), data.msg, data.details)
+        title = data.title or _('There was an error processing the book')
+        if data.is_non_critical:
+            warning_dialog(title, data.msg, data.details, on_close=ui_operations.focus_iframe)
+            return
+        ui_operations.show_error(title, data.msg, data.details)
 
     def apply_color_scheme(self):
         ans = resolve_color_scheme()