-e: see title, using the LWRP template the scene is just the skybox and grey (see screenshot)
--works well on 2018.2, doesn't work in 2018.3

-repro:
--create new project with them LWRP template
--open sample scene and see how it looks
--build&run for WebGL
--NOTICE the scene is just gray and errors/warnings are thrown in the console:
---Error: WebGL warning: bindTexture: target: invalid enum value <enum 0x9100>
---Error: WebGL warning: getTexParameter: Invalid texTarget.
---Error: WebGL warning: texParameter: Invalid texTarget.
---Error: WebGL warning: TexStorage2D: Invalid texTarget.
---Error: WebGL warning: framebufferTexture2D: `texture` has never been bound.