[Err] [REST.cc:205] Error in REST request during startup gazebo

$ gazebo /opt/ros/crystal/share/gazebo_plugins/worlds/gazebo_ros_joint_state_publisher_demo.world

[Err] [REST.cc:205] Error in REST request

libcurl: (51) SSL: no alternative certificate subject name matches target host name 'api.ignitionfuel.org'

Fix bug

change ~/.ignition/fuel/config.yaml as following.

url: https://api.ignitionfuel.org

to

url: https://api.ignitionrobotics.org