D|FR0997 - CAn't find extension

HI

Trying to follow the wiki guide for the DFR0997 display 

Have connected the display to MicroBit as shown but when i try to import the extension as shown in the guide ….

https://github.com/DFRobot/pxt-DFRobot_lcdDisplay


i get the following error message,,,,

We couldn't find any extensions matching 'https://github.com/DFRobot/pxt-DFRobot_lcdDisplay'


Please help

regards

Jason