React Native Debug JS Remotely Error window.deltaUrlToBlobUrl is not a function

I am trying to to debug the react native app, If I don't try to debug JS remotely then everything is fine, but when I try to debug JS remotely I do get this error.

I had this error too. The reason for me was the opened debugger tab in chrome from previous session. So when I closed it everything works fine now :)

try to change your URL of Chrome from http://localhost:8081/debugger-ui/ to http://192.168.XXXX.XXXX.xip.io:8081/debugger-ui/

source: https://github.com/facebook/react-native/issues/17618

I had same error, I just closed the browser and refreshed my simulator. It may open the browser window again with debugging window. But it takes care of the error. If not I suggest terminating your simulator and running the build commands again.