Problem Getting Z Offset

Whenever I try to get the Z offset using M851 my Lulzbot Mini stops responding. Is there an easy way to fix this? Or is there a way in the latest version of Cura to set the offset?

Could you clarify a bit more with what it means that your Mini stops responding? Does it give an error code, or does it just stall and do nothing? You may want to try and cycle the the connection to the Mini to make sure that the printer is fully connected before you try and send the command.