Czml loading error

Hello,

When I am loading a czml file I am getting the following error. The czml file was created from STK.

RuntimeError: Fragment shader failed to compile. Compile log: WARNING: 0:2: ‘GL_OES_standard_derivatives’ : extension is not supported
ERROR: 0:233: ‘=’ : dimension mismatch
ERROR: 0:233: ‘assign’ : cannot convert from ‘highp 2-component vector of float’ to ‘highp 3-component vector of float’

Error
at new RuntimeError (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:13405:13)
at createAndLinkProgram (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:72948:11)
at reinitialize (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:73101:21)
at initialize2 (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:73096:5)
at ShaderProgram._bind (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:73155:5)
at beginDraw (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:182566:19)
at Context.draw (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:182652:5)
at DrawCommand.execute (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:69944:13)
at executeCommand (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:226682:15)
at executeCommands2 (https://sandcastle.cesium.com/CesiumUnminified/Cesium.js:226986:9)

I am pasting czml file here

Thanks
LIbish