Rviz cannot find resource pack/ cannot load model

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Hello I am trying to visualize EvARobot on RViz but when I run RViz I get this and I can only see two parts of robot. How can I fix this? NOTE: evarobot_description and all other files exist.

metobom@metobom-TULPAR-T5-V17-1:~$ rosrun rviz rviz
[ INFO] [1549745352.700308037]: rviz version 1.12.16
[ INFO] [1549745352.700362956]: compiled against Qt version 5.5.1
[ INFO] [1549745352.700376228]: compiled against OGRE version 1.9.0 (Ghadamon)
[ INFO] [1549745352.861618679]: Stereo is NOT SUPPORTED
[ INFO] [1549745352.861736050]: OpenGl version: 3 (GLSL 1.3).
[rospack] Error: package 'evarobot_description' not found
[librospack]: error while executing command
[ERROR] [1549745352.990890627]: Error retrieving file [package://evarobot_description/meshes/base.stl]: Package [evarobot_description] does not exist
[ WARN] [1549745352.991040897]: OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[ERROR] [1549745352.991178442]: Could not load model 'package://evarobot_description/meshes/base.stl' for link 'base_link': OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[ WARN] [1549745352.991264554]: OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[ERROR] [1549745352.991336207]: Could not load model 'package://evarobot_description/meshes/base.stl' for link 'base_link': OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[rospack] Error: package 'evarobot_description' not found
[librospack]: error while executing command
[ERROR] [1549745353.013034291, 94.949000000]: Error retrieving file [package://evarobot_description/meshes/base_orange.stl]: Package [evarobot_description] does not exist
[ WARN] [1549745353.013137282, 94.949000000]: OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base_orange.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[ERROR] [1549745353.013211398, 94.949000000]: Could not load model 'package://evarobot_description/meshes/base_orange.stl' for link 'basecolor_link': OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base_orange.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[ WARN] [1549745353.013272989, 94.949000000]: OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes/base_orange.stl in resource group Autodetect or any other group. in ResourceGroupManager::openResource at /build/ogre-1.9-mqY1wq/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreResourceGroupManager.cpp (line 756)
[ERROR] [1549745353.013344071, 94.949000000]: Could not load model 'package://evarobot_description/meshes/base_orange.stl' for link 'basecolor_link': OGRE EXCEPTION(6:FileNotFoundException): Cannot locate resource package://evarobot_description/meshes ...