web gl error in loading xml files

web gl error in loading xml files it is my web gl export error and i dont know why web gl error in loading xml files

 > Unable to find type
 > [UnityEngine.dll]UnityEngine.AssemblyIsEditorAssembly
 > webgl.js:1_JS_Log_Dump webgl.js:1
 > 2WARNING: Shader Unsupported: 'Legacy
 > Shaders/Diffuse' - Pass 'DEFERRED'
 > shader state not supported
 > index.html:59 Unloading 2 Unused
 > Serialized files (Serialized files now
 > loaded: 0) index.html:59 
 > index.html:59 Unloading 84 unused
 > Assets to reduce memory usage. Loaded
 > Objects now: 1091. index.html:59
 > Total: 37.174999 ms (FindLiveObjects:
 > 0.806000 ms CreateObjectMapping: 5.538000 ms MarkObjects: 22.757999 ms  DeleteObjects: 7.894000 ms)
 > index.html:59  index.html:59 Invoking
 > error handler due to Uncaught 28300112
 > UnityConfig.js:74 Uncaught 28300112