Got this error related to terrain

Hi, sometime i get this error related to the terrain generator, now it popped out just when changing camera, i thought it was due to my poor connection before but now i’m not sure
Failed to compile vertex shader:

1: #version 300 es
2:
3:
4:
5: #extension GL_ANGLE_multi_draw : enable
6:
7: #define attribute in
8: #define varying out
9: #define texture2D texture
10: #define utexture2D texture
11: #define itexture2D texture
12: #define GL2
13: #define VERTEXSHADER
14:
15: #define TEXTURE_PASS(name) name
16: #define TEXTURE_ACCEPT(name) sampler2D name
17: #define TEXTURE_ACCEPT_HIGHP(name) highp sampler2D name
18: #define CAPS_TEXTURE_FLOAT_FILTERABLE
19: #define CAPS_TEXTURE_FLOAT_RENDERABLE
20: #define PLATFORM_DESKTOP
21:
22: #define NORMALS true
23: #define UV0 true
24: #define UV0_UNMODIFIED true
25: #define UV_TRANSFORMS_COUNT 0
26: #define SCENE_COLORMAP_GAMMA
27: #define FOG LINEAR
28: #define TONEMAP LINEAR
29: #define GAMMA SRGB
30: #define FORWARD_PASS
31:
32:
33: precision highp float;
34: precision highp int;
35: precision highp usampler2D;
36: precision highp isampler2D;
37: precision highp sampler2DShadow;
38: precision highp samplerCubeShadow;
39: precision highp sampler2DArray;