No one has replied
OS X Yosemite and later
Use the following Terminal command to reset the DNS cache in OS X v10.10.4 or later:
sudo killall -HUP mDNSResponder
@Anderson WE also find a situation : device is not expired, but router or modem got some error. you can try to reset your modem / router and reconnect MJ again.
Disabled Categories are greyed out