unity 5.6 webgl error when run project,error CS0117: `UnityEngine.Application' does not contain a definition for `WebGLPlayer'

hi everyone I have a problem with WebGL player with all version of unity help me please![alt text][1] [1]: /storage/temp/109286-capture-decran-2018-01-15-a-025721.png ,hi everyone I have a problem with WebGL player with all version of unity help me please ![alt text][1] [1]: /storage/temp/109282-capture-decran-2018-01-15-a-025721.png