WRLD Unity SDK Shader Error

Hi friends,

I'm using Unity 2018.2.0b4 version, and WRLD Unity SDK, when I'm trying to make build I get this shader error:

Shader error in 'Wrld/StandardWithVertexColor': 'mainLight': initial value must be a literal expression at Assets/Wrld/Shaders/UnityVC.cginc(153) (on d3d11)

Compiling Vertex program with UNITY_PASS_FORWARDBASE DIRECTIONAL LIGHTPROBE_SH _ALPHABLEND_ON _VERTEXCOLOR_OFF
Platform defines: UNITY_ENABLE_REFLECTION_BUFFERS UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_PBS_USE_BRDF1 UNITY_SPECCUBE_BOX_PROJECTION UNITY_SPECCUBE_BLENDING UNITY_ENABLE_DETAIL_NORMALMAP SHADER_API_DESKTOP UNITY_COLORSPACE_GAMMA UNITY_LIGHT_PROBE_PROXY_VOLUME UNITY_LIGHTMAP_FULL_HDR

Any suggestions how can we fix this?
Thanks in advance!