如何纠正nodejs的问题，反应应用程序没有正确加载与内容安全策略相关的内容

I'm currently having issues with my code not deploying on heroku with a "Cannot GET /" message, when I seem to have no issues when running the server on my laptop. I'm not sure if it's a path issue as my console issued the following error: Content Security Policy: The page’s settings blocked the loading of a resource at self (“default-src I'm currently having issues with my code not de