Dear Kano,
After conducting several tests, I discovered that installing Raspbian with Jessie(obsolete) on a Raspberry Pi 3+B does not work anymore for CGminer. I tried again with a Raspberry Pi Zero W running Raspbian (not Jessie) and successfully installed CGMiner. As soon as I receive the ANTMINER U2 V1.2(probably tomorrow from ebay), I will attempt to connect it to the cksolo pool. Thank you for your support