Prevent executor impossible states from emitting

Fixes codesandbox#2196
Fixes codesandbox#2192

Author: CompuIves

packages/app/src/app/store/providers/Executor.js

@@ -12,14 +12,22 @@ export default Provider({
     const signal = this.context.controller.getSignal(signalPath);
     const executor = executorsManager.getExecutor();
 
+    if (!executor) {
+      throw new Error(
+        'Executor is not defined yet, this is an impossible state'
+      );
+    }
+
     return executor.on(event, data => {
       signal({ event, data: data || {} });
     });
   },
   emit(message, data) {
     const executor = executorsManager.getExecutor();
 
-    return executor.emit(message, data);
+    if (executor) {
+      executor.emit(message, data);
+    }
   },
   closeExecutor() {
     return executorsManager.closeExecutor();

packages/app/src/app/utils/executor-manager.ts

@@ -106,13 +106,7 @@ export class ExecutorsManager {
    *   to either the sandbox or the server executor. Changing the executor would probably also result in components unmounting/
    *   remounting and registering new listeners.
    */
-  getExecutor(): IExecutor {
-    if (!this.executor) {
-      throw new Error(
-        'Executor is not defined yet, this is an impossible state'
-      );
-    }
-
+  getExecutor(): IExecutor | undefined {
     return this.executor;
   }