Character falls when I upload build to my server

Hi friends, my character (pawn) work fine in the editor and standalone preview, but when I export to html5 and test in HTML5LaunchHelper or upload to my website, pawn falls. All the collisions seems ok and the capsule is over the floor. The staticmeshes’s collisions are setting like “block all”.

I think there is a problem with html5 because the work runs in PC and VR versions with any problem.

I’m really lost.