chore: 预加载组件时容忍对应组件没找到

packages/amis-core/src/RootRenderer.tsx

@@ -65,7 +65,7 @@ export class RootRenderer extends React.Component<RootRendererProps> {
           }
         }
       });
-      return loadAsyncRenderersByType(types);
+      return loadAsyncRenderersByType(types, true);
     });
   }
 

packages/amis-core/src/factory.tsx

@@ -310,7 +310,9 @@ export async function loadAsyncRenderer(renderer: RendererConfig) {
 
 export function isAsyncRenderer(item: RendererConfig) {
   return (
-    (!item.component || item.component === Placeholder) && item.getComponent
+    item &&
+    (!item.component || item.component === Placeholder) &&
+    item.getComponent
   );
 }