If the test loads fine but it is very laggy or slow, it just means that your device doesn't have good enough hardware to run AutoProctor. Your device may be running Facebook and YouTube perfectly well, but remember that AutoProctor is capturing video from your device and running Artificial Intelligence algorithms on it. So, it requires much more processing power.

You can try closing all other apps on your device, and rebooting your device just before you take the test. But, if you still cannot run the test, unfortunately there is nothing we can do about it.