"(nvoglv32.dll) in OpenGLCourseApp.exe: 0xC0000005: Access violation reading location 0x00000000." error when unbinding Index Buffer

I am currently trying to learn OpenGL and have run into a problem. It seems like when I try to unbind my Index Buffer, the error "Exception thrown at 0x78787D80 (nvoglv32.dll) in OpenGLCourseApp.exe: 0xC0000005: Access violation reading location 0x00000000." pops up and therefore I can't run my program.

Here is my code for reference:

void CreateTriangle() {
    unsigned int indices[] = {
        0, 3, 1,
        1, 3, 2,
        2, 3, 0,
        0, 1, 2
    };


    GLfloat vertices[] = {
        -1.0f, -1.0f, 0.0f,
        0.0f, -1.0f, 1.0f,
        1.0f, -1.0f, 0.0f,
        0.0f, 1.0f, 0.0f
    };

    // Create and Bind VAO
    glGenVertexArrays(1, &VAO);
    glBindVertexArray(VAO);

    glGenBuffers(1, &IBO);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);

    // Create and Bind VBO
    glGenBuffers(1, &VBO);
    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(0);

    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
    glDeleteBuffers(1, &IBO);

    glBindVertexArray(0);


}

int main() {
    /..

    CreateTriangle();
    CompileShaders();

    // Loop until window is closed
    while (!glfwWindowShouldClose(mainWindow)) {
        /..

        glBindVertexArray(VAO);
        // glDrawArrays(GL_TRIANGLES, 0, 3);
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
        glBindVertexArray(0);
        glDrawElements(GL_TRIANGLES, 12, GL_UNSIGNED_INT, 0);
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
        // glDeleteBuffers(1, &IBO);
        glUseProgram(0);

        glfwSwapBuffers(mainWindow);
    }


    return 0;
}

So, in int main(), when I try to unbind the index buffer via glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);, it errors out with "Exception thrown at 0x78787D80 (nvoglv32.dll) in OpenGLCourseApp.exe: 0xC0000005: Access violation reading location 0x00000000." I have tried doing glDeleteBuffers(1, &IBO);, but that doesn't seem to work. I've even tried glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, nullptr); and that doesn't work either. It doesn't seem like an NVIDIA Driver from what I've heard, rather something is returning as NULL and the driver doesn't like it maybe?