URP , shader error,,,implicit truncation of vector type error!

I create new project and new URP lit shader graph. then, everytime, errors come.

implicit truncation of vector type Compiling Vertex program with FOG_EXP2 _MAIN_LIGHT_SHADOWS _SHADOWS_SOFT _ADDITIONAL_LIGHTS _MAIN_LIGHT_SHADOWS_CASCADE _ADDITIONAL_LIGHT_SHADOWS 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_LIGHT_PROBE_PROXY_VOLUME UNITY_LIGHTMAP_RGBM_ENCODING Disabled keywords: DOTS_INSTANCING_ON _SCREEN_SPACE_OCCLUSION LIGHTMAP_ON DIRLIGHTMAP_COMBINED _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_OFF LIGHTMAP_SHADOW_MIXING SHADOWS_SHADOWMASK INSTANCING_ON FOG_LINEAR FOG_EXP UNITY_NO_DXT5nm UNITY_ENABLE_NATIVE_SHADOW_LOOKUPS UNITY_METAL_SHADOWS_USE_POINT_FILTERING UNITY_NO_SCREENSPACE_SHADOWS UNITY_PBS_USE_BRDF2 UNITY_PBS_USE_BRDF3 UNITY_NO_FULL_STANDARD_SHADER UNITY_HARDWARE_TIER1 UNITY_HARDWARE_TIER2 UNITY_HARDWARE_TIER3 UNITY_COLORSPACE_GAMMA UNITY_HALF_PRECISION_FRAGMENT_SHADER_REGISTERS UNITY_LIGHTMAP_DLDR_ENCODING UNITY_LIGHTMAP_FULL_HDR UNITY_VIRTUAL_TEXTURING UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION UNITY_ASTC_NORMALMAP_ENCODING SHADER_API_GLES30

and that shader graphdoesn't apply to the materials.

and 'master' , 'paint1g_wanim_shader' error too. (these are 'shader warning~~implicit truncation of vector type' in console.)

plz

(2020 2.6f1)