From time to time, you may be prompted to download and install the geolocation plugin even if you had previously been able to play on site. This may happen if you have changed certain settings on your network connection or installed programs which may conflict with the plugin. If you have installed the plugin several times, or receive a message that installation has failed, completely removing and reinstalling the plugin should resolve the issue. If you recently switched to Verizon FiOS for your internet, please see some additional troubleshooting here