Volume cannot display in in iOS

I want to display Volume in iPhone (iPhone xR os 13.4 Xcode 11.3.1 VTK 8.2.0)

I use Examples /VTK-8.2.0/Examples/iOS/VolumeRender

but I got the error message:
Generic Warning: In /VTK-8.2.0/Rendering/OpenGL2/vtkOpenGLState.cxx, line 617

Error glEnable/Disable1 OpenGL errors detected

0 : (1286) Unknown error

with stack trace of

WARNING: The stack could not be examined because backtrace is not supported.

Generic Warning: In /VTK/build/CMakeExternals/Build/vtk-ios-device-arm64/Rendering/OpenGL2/vtkOpenGLError.h, line 207

Failed to allocate 3D texture.1 OpenGL errors detected

0 : (1282) Invalid operation

ERROR: In /VTK-8.2.0/Rendering/VolumeOpenGL2/vtkVolumeTexture.cxx, line 762

vtkVolumeTexture (0x10460e340): Texture 3D allocation failed!

ERROR: In /VTK-8.2.0/Rendering/OpenGL2/vtkShaderProgram.cxx, line 461

vtkShaderProgram (0x2816b0870): 1: #version 300 es

ERROR: In /VTK-8.2.0/Rendering/OpenGL2/vtkShaderProgram.cxx, line 462

vtkShaderProgram (0x2816b0870): ERROR: 0:416: ‘/’ does not operate on ‘vec2’ and 'ivec2’

ERROR: 0:417: Use of undeclared identifier 'jitterValue’

ERROR: In /VTK-8.2.0/Rendering/VolumeOpenGL2/vtkOpenGLGPUVolumeRayCastMapper.cxx, line 3029

vtkOpenGLGPUVolumeRayCastMapper (0x107d07200): Shader failed to compile

I don’t know how to solve it

I have same issue too… Did you resolve this???