Error with UMP Pro for WebGL

Hello everyone !
I'm currently working on a project with friends, a game in WebGl. We needed the possibility to put some video from youtube or others plateforms, so we decided to buy UMp Pro (https://www.assetstore.unity3d.com/en/#!/content/83281)

But he problem is that we are unable to use it... whenever, on the prefab we click on the WebGL option, It always tell that it isn't supported in the current version.

I tried on the player prefs to change WebGl version, 1.0 or 2.0, but nothing change.

Have someone used it for WebGl and know what to do ?

Regards,

Corentin

 

did you solve it?