It seems that you are trying to connect to a Hotspot in client mode. For this, you need to install additional package called ‘TravelMate’. I suggest you follow a configuration example on our wiki page here.
First of all, make sure you have the latest firmware version installed on your RUTX11. You can find the firmware for RUTX11 here.
If you cannot download the package from the WebUI, i.e. there is no internet access on RUTX11, you can download the package from the Wiki and upload it manually to RUTX11 in Services → Package Manager → Upload. You can find packages for RUTX11 here.