Uncaught (in promise) TypeError: Failed to execute 'fetch' on 'WorkerGlobalScope': Illegal invocation

Question

I have an object host in a typescript code, which is created as:

const host: Host = {
    fetch: globalThis.fetch,
    ...
}

Now when the entire project is built and ran on google chrome (using rush), then the system crashes and the console shows the error

Uncaught (in promise) TypeError: Failed to execute 'fetch' on 'WorkerGlobalScope': Illegal invocation

This Error is caught on a statement that goes like

const response: Response = await host.fetch(url, ...);

I am unable to understand what does this error mean and what might have caused it. Any help would be really appreciated.