A custom JavaScript error caused an issue loading your dashboard. See the developer console for more details.

[code2319]

I'm trying to follow this tutorial (https://github.com/splunk/splunk-app-examples/tree/master/tutorials/Module-02_SetupPage/devtutorial) to set up password for my GeneratingCommand, but getting the error "A custom JavaScript error caused an issue loading your dashboard. See the developer console for more details.". Is there a way to fix it?

react.production.min.js:1 
       Failed to load resource: the server responded with a status of 404 (Not Found)Understand this errorAI
common.js:1514 Error: Script error for: react
http://requirejs.org/docs/errors.html#scripterror
    at makeError (eval at e.exports (common.js:561:219217), <anonymous>:166:17)
    at HTMLScriptElement.onScriptError (eval at e.exports (common.js:561:219217), <anonymous>:1689:36)
d.onError @ common.js:1514Understand this errorAI
react-dom.production.min.js:1 
       Failed to load resource: the server responded with a status of 404 (Not Found)Understand this errorAI
common.js:1514 Error: Script error for: ReactDOM
http://requirejs.org/docs/errors.html#scripterror
    at makeError (eval at e.exports (common.js:561:219217), <anonymous>:166:17)
    at HTMLScriptElement.onScriptError (eval at e.exports (common.js:561:219217), <anonymous>:1689:36)

Splunk Enterprise
Version: 9.0.4.1
Build: 419ad9369127