尝试设置TextureCoord参数时，WebGL返回错误

我有一个简单的webGL程序，几乎可以从Mozilla开发人员网络复制粘贴内容。由于某种原因，我设法创建了一种具有单色的立方体侧面，并在顶部和底部创建了纹理，并且可以看到纹理，但是我不确定是否正确设置了闪电。我正在尝试修复以下错误，而我尝试使用aTextureCoord参数初始化着色器时发现该错误发生。以下是我的着色器和我要使用的javascript代码。有人能弄清楚为什么会发生这种情况吗？属性highp vec3 aVertexNormal; 属性highp vec3 aVertexPosition; 属性highp vec2 aTextureCoord;

uniform highp mat4 uNormalMatrix;
uniform highp mat4 uMVMatrix;
uniform highp mat4 uPMatrix;

varying highp vec3 vLighting;
varying highp vec2 vTextureCoord;

void main(void) {
  gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
  vTextureCoord = aTextureCoord;

  highp vec3 ambientLight = vec3(0.6, 0.6, 0.6);
  highp vec3 directionalLightColor = vec3(0.5, 0.5, 0.75);
  highp vec3 directionalVector = vec3(0.85, 0.8, 0.75);

  highp vec4 transformedNormal = uNormalMatrix * vec4(aVertexNormal, 1.0);

  highp float directional = max(dot(transformedNormal.xyz, directionalVector), 0.0);
  vLighting = ambientLight + (directionalLightColor * directional);
 }
</script>

以下是javascript代码。

      shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
  gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);      
  shaderProgram.vertexColorAttribute = gl.getAttribLocation(shaderProgram, "aVertexColor");
  gl.enableVertexAttribArray(shaderProgram.vertexColorAttribute);     
  shaderProgram.pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
  shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");

  shaderProgram4Tex.vertexPositionAttribute = gl.getAttribLocation(shaderProgram4Tex, "aVertexPosition");
  gl.enableVertexAttribArray(shaderProgram4Tex.vertexPositionAttribute);      
  shaderProgram4Tex.vertexTextureAttribute = gl.getAttribLocation(shaderProgram4Tex, "aTextureCoord");
  gl.enableVertexAttribArray(shaderProgram4Tex.vertexTextureAttribute);   
  shaderProgram4Tex.pMatrixUniform = gl.getUniformLocation(shaderProgram4Tex, "uPMatrix");
  shaderProgram4Tex.mvMatrixUniform = gl.getUniformLocation(shaderProgram4Tex, "uMVMatrix");
  shaderProgram4Tex.vertexNormalAttribute = gl.getAttribLocation(shaderProgram4Tex, "aVertexNormal");
  gl.enableVertexAttribArray(shaderProgram4Tex.vertexNormalAttribute);
  shaderProgram4Tex.samplerUniform = gl.getUniformLocation(shaderProgram4Tex, "uSampler");
  shaderProgram4Tex.normalMatrix = gl.getUniformLocation(shaderProgram4Tex, "uNormalMatrix");

运行程序时出现以下错误。

 WebGL: INVALID_OPERATION: drawElements: attribs not setup correctly

希望有人能回答这个问题，因为我已经花了10个小时来解决这个问题，却不知道为什么会这样。