i tried to launch the gazebo by using this scripts:

roslaunch robotarmpkg checkmotorsgazebo.launch

and the gazebo works but just for a few seconds , and then crashing. and this message appear :

... logging to /home/abdullah/.ros/log/454c6be8-d2aa-11eb-98e4-000c29b7d174/roslaunch-abdullah-3100.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.

started roslaunch server http://abdullah:45069/

SUMMARY

PARAMETERS * /armcontroller/gains/basejoint/d: 1 * /armcontroller/gains/basejoint/i: 1 * /armcontroller/gains/basejoint/iclamp: 1 * /armcontroller/gains/basejoint/p: 100 * /armcontroller/gains/elbow/d: 1 * /armcontroller/gains/elbow/i: 1 * /armcontroller/gains/elbow/iclamp: 1 * /armcontroller/gains/elbow/p: 100 * /armcontroller/gains/shoulder/d: 1 * /armcontroller/gains/shoulder/i: 1 * /armcontroller/gains/shoulder/iclamp: 1 * /armcontroller/gains/shoulder/p: 100 * /armcontroller/gains/wrist/d: 1 * /armcontroller/gains/wrist/i: 1 * /armcontroller/gains/wrist/iclamp: 1 * /armcontroller/gains/wrist/p: 100 * /armcontroller/joints: ['basejoint', 's... * /armcontroller/type: positioncontroll... * /gazebo/enablerosnetwork: True * /jointstatecontroller/publishrate: 50 * /jointstatecontroller/type: jointstatecontr... * /robotdescription: <?xml version="1.... * /rosdistro: melodic * /rosversion: 1.14.11 * /usesimtime: True

NODES / controllerspawner (controllermanager/spawner) gazebo (gazeboros/gzserver) gazebogui (gazeboros/gzclient) spawngazebomodel (gazeboros/spawn_model)

auto-starting new master process[master]: started with pid [3121] ROSMASTERURI=http://localhost:11311

setting /runid to 454c6be8-d2aa-11eb-98e4-000c29b7d174 process[rosout-1]: started with pid [3132] started core service [/rosout] process[gazebo-2]: started with pid [3135] process[gazebogui-3]: started with pid [3137] process[spawngazebomodel-4]: started with pid [3143] process[controllerspawner-5]: started with pid [3146] [INFO] [1624291479.800427, 0.000000]: Controller Spawner: Waiting for service controllermanager/loadcontroller [ INFO] [1624291507.123055695]: Finished loading Gazebo ROS API Plugin. [ INFO] [1624291507.125318735]: Finished loading Gazebo ROS API Plugin. [ INFO] [1624291507.130904998]: waitForService: Service [/gazebo/setphysicsproperties] has not been advertised, waiting... [ INFO] [1624291507.133662790]: waitForService: Service [/gazebogui/setphysicsproperties] has not been advertised, waiting... [INFO] [1624291509.677748, 0.000000]: Loading model XML from ros parameter robotdescription [INFO] [1624291509.730407, 0.000000]: Waiting for service /gazebo/spawnurdfmodel [WARN] [1624291509.936234, 0.000000]: Controller Spawner couldn't find the expected controllermanager ROS interface. [controllerspawner-5] process has finished cleanly log file: /home/abdullah/.ros/log/454c6be8-d2aa-11eb-98e4-000c29b7d174/controllerspawner-5.log [ INFO] [1624291529.872289630]: waitForService: Service [/gazebo/setphysicsproperties] is now available. [ INFO] [1624291529.940571525]: Physics dynamic reconfigure ready. [INFO] [1624291530.049455, 0.000000]: Calling service /gazebo/spawnurdfmodel [INFO] [1624291530.759573, 0.001000]: Spawn status: SpawnModel: Successfully spawned entity [spawngazebomodel-4] process has finished cleanly log file: /home/abdullah/.ros/log/454c6be8-d2aa-11eb-98e4-000c29b7d174/spawngazebomodel-4.log [ INFO] [1624291532.783767228, 0.001000000]: Loading gazeboroscontrol plugin [ INFO] [1624291532.785322962, 0.001000000]: Starting gazeboroscontrol plugin in namespace: / [ INFO] [1624291532.861890401, 0.001000000]: gazeboroscontrol plugin is waiting for model URDF in parameter [robotdescription] on the ROS param server. [ERROR] [1624291533.573922997, 0.001000000]: No p gain specified for pid. Namespace: /gazeboroscontrol/pidgains/basejoint [ERROR] [1624291533.575293236, 0.001000000]: No p gain specified for pid. Namespace: /gazeboroscontrol/pidgains/shoulder [ERROR] [1624291533.576512446, 0.001000000]: No p gain specified for pid. Namespace: /gazeboroscontrol/pidgains/elbow [ERROR] [1624291533.577668324, 0.001000000]: No p gain specified for pid. Namespace: /gazeboroscontrol/pidgains/wrist [ INFO] [1624291534.600570992, 0.001000000]: Loaded gazeboroscontrol. [Err] [REST.cc:205] Error in REST request

libcurl: (51) SSL: no alternative certificate subject name matches target host name 'api.ignitionfuel.org' VMware: vmwioctlcommand error Invalid argument. Aborted (core dumped) [gazebogui-3] process has died [pid 3137, exit code 134, cmd /opt/ros/melodic/lib/gazeboros/gzclient _name:=gazebogui _log:=/home/abdullah/.ros/log/454c6be8-d2aa-11eb-98e4-000c29b7d174/gazebogui-3.log]. log file: /home/abdullah/.ros/log/454c6be8-d2aa-11eb-98e4-000c29b7d174/gazebo_gui-3*.log

how can i fix the problem.