libGDX HTML5 deployment exception

Question

I am trying to compile the libGDX project using GWT (libgdx-project-html right click -> Google -> GWT Compile).

I get no errors while compiling except

Answer 1

For anyone having the same problem or any other similar/weird exceptions.

Make sure that strict flag is set by adding

-strict

in the compiling arguments and most importantly, you are using

GL20

as WebGL is based on GL20 and doesn't support GL10.