So I was running into this error _os.platform is not a function. (In ‘_os.platform()’, ‘_os.platform’ is undefined) and I didn’t know what I did to cause it until now.
I actually tried the suggestions that you see below that came with the error but that didn’t help.
Invariant Violation: "main" has not been registered. This can happen if:
* Metro (the local dev server) is run from the wrong folder. Check if Metro is running, stop it and restart it in the current project.
* A module failed to load due to an error and `AppRegistry.registerComponent` wasn't called., js engine: hermes
In my attempt to troubleshoot I found many other posts[oldish] with this same issue left unsolved, so I decided to post up my solution to possibly help others.
In one of my components that I was working on somehow this import line —> **import { transform } from "typescript";** <---- was added. I suspect it was when I was adding the ‘transform’ style to a component but I probably hit the enter key on the wrong autocomplete option, thus importing this transform thing. Anyways removing this import line got rid of the error. So I would say make sure you don’t have any strange imports that you don’t recognize.