im getting an error “Invariant Violation: “main” has not been registered.”

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
  at node_modulesreact-nativeLibrariesCoreExceptionsManager.js:null in reportException
  at node_modulesreact-nativeLibrariesCoreExceptionsManager.js:null in handleException

• … 7 more stack frames from framework internals

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I’m just calling one file . When I call that file it through thi error