No, the GroveWeatherPi has a number of different sensors. You could look at the tutorials of the GroveWeatherPi (and the product contents of the GroveWeatherPi Bundle on store.switchdoc.com) and figure out what you have to buy to move to a Raspberry Pi based station.
We don't know what your error is coming from. Try a different browser. Chrome/Edge/Firefox etc. That looks like a browser problem.