import deepmerge was missing

Viewer/src/managers/sceneManager.ts

@@ -7,6 +7,7 @@ import { ViewerLabs } from '../labs/viewerLabs';
 import { getCustomOptimizerByName } from '../optimizer/custom/';
 import { ObservablesManager } from '../managers/observablesManager';
 import { ConfigurationContainer } from '../configuration/configurationContainer';
+import { deepmerge } from '../helper';
 
 /**
  * This interface describes the structure of the variable sent with the configuration observables of the scene manager.