Added check to see if componentPath is defined

If a component defined in running does not exist, the componentPath in updateComponent will be undefined. Added a check that skips the update if that is the case. Otherwise the dashboard will crash as it will try to perform operations on the undefined object that it cannot perform.

Author: aGitForEveryone

dash/dash-renderer/src/actions/callbacks.ts

@@ -334,6 +334,11 @@ function updateComponent(component_id: any, props: any) {
     return function (dispatch: any, getState: any) {
         const paths = getState().paths;
         const componentPath = getPath(paths, component_id);
+        if (typeof componentPath === 'undefined') {
+            // Can't find the component that was defined in the running keyword,
+            // Let's skip the component to prevent the dashboard from crashing.
+            return;
+        }
         dispatch(
             updateProps({
                 props,