problem appears

ok it is just a simple cube over a plan
yesterday i got bad render in edge and chrome but perfect in firefox so i decided to reinstall everything
today i reinstall blender and blende4web so now the probleme is also in firefox
that is this horrible render?


how can i fix this problem because i did'nt previously
something i trick in blender?????

and now in add object constraint
follow path is not suppoted
copy location is not supported

i reinstalled everything but get the same probleme i can t use no object constrainte i get
…… constraint is not supported and this for all the constrainte