Why is roslaunch giving Error in REST REquest and also a blank screen upon first startup? [closed]

edit

Straight dump of the output:

teetangh@ubuntu:~$ roslaunch mybot_gazebo mybot_world.launch
... logging to /home/teetangh/.ros/log/a684d8b0-7fd5-11ea-9265-000c29eb89ab/roslaunch-ubuntu-21372.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

xacro.py is deprecated; please use xacro instead
started roslaunch server http://ubuntu:40737/

SUMMARY
========

PARAMETERS
 * /gazebo/enable_ros_network: True
 * /robot_description: <?xml version="1....
 * /rosdistro: melodic
 * /rosversion: 1.14.5
 * /use_sim_time: True

NODES
  /
    gazebo (gazebo_ros/gzserver)
    gazebo_gui (gazebo_ros/gzclient)
    mybot_spawn (gazebo_ros/spawn_model)

ROS_MASTER_URI=http://localhost:11311

process[gazebo-1]: started with pid [21390]
process[gazebo_gui-2]: started with pid [21395]
process[mybot_spawn-3]: started with pid [21398]
[ INFO] [1587036825.679300153]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1587036825.681287796]: waitForService: Service [/gazebo_gui/set_physics_properties] has not been advertised, waiting...
[gazebo-1] process has died [pid 21390, exit code 255, cmd /opt/ros/melodic/lib/gazebo_ros/gzserver -e ode /home/teetangh/mybot_ws/src/mybot_gazebo/worlds/mybot.world __name:=gazebo __log:=/home/teetangh/.ros/log/a684d8b0-7fd5-11ea-9265-000c29eb89ab/gazebo-1.log].
log file: /home/teetangh/.ros/log/a684d8b0-7fd5-11ea-9265-000c29eb89ab/gazebo-1*.log
[INFO] [1587036825.879567, 0.000000]: Loading model XML from ros parameter robot_description
[INFO] [1587036825.882774, 0.000000]: Waiting for service /gazebo/spawn_urdf_model
[Err] [REST.cc:205] Error in REST request

libcurl: (51) SSL: no alternative certificate subject name matches target host name 'api.ignitionfuel.org'
terminate called after throwing an instance of 'boost::system::system_error'
  what():  End of file
Aborted (core dumped)
[gazebo_gui-2] process has died [pid 21395, exit code 134, cmd /opt/ros/melodic/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/teetangh/.ros/log/a684d8b0-7fd5-11ea-9265-000c29eb89ab/gazebo_gui-2.log].
log file: /home/teetangh/.ros/log/a684d8b0-7fd5-11ea-9265-000c29eb89ab/gazebo_gui-2*.log