DrawBuffers() got a range of indices but no index buffer

I got an error

DrawBuffers() got a range of indices but no index buffer

when using the script from the tutorial on youtube. It's an old tutorial but I don't see any problem with his script. I'm following his tutorial and lot of particle system properties has changed in the newest unity (I'm using unity 2019 and he is using unity 5).
His script:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. public class ShurikenBakedMeshEmitter : MonoBehaviour {
4.    
5.     [Tooltip("Mesh you want to use with particles")]
6.     public SkinnedMeshRenderer skin;
7.     // Save the current shape of the mesh used
8.     Mesh baked;
9.     // Particle system used for playback
10.     ParticleSystem particle;
11.     ParticleSystemRenderer render;
12.     [Tooltip("Particle playback / stop")]
13.     public bool emit;
14.     [Tooltip("Interval to emit particles (seconds)")]
15.     public float coolDown = 0.5f;
16.     // Current waiting time
17.     float interval = 0;
18.     // Use this for initialization
19.     void Start () {
20.         // Stop this script if the source mesh is not specified
21.         if(!skin)
22.             this.enabled = false;
23.         // Access to used particle system
24.         particle = GetComponent<ParticleSystem>();
25.         render = GetComponent<ParticleSystemRenderer>();
26.     }
27.    
28.     // Update is called once per frame
29.     void Update () {
30.         // If emit is true
31.         if(emit){
32.             // Calculation of waiting time
33.             interval -= Time.deltaTime;
34.             // If the required waiting time has passed ...
35.             if(interval < 0){
36.                 // Play a new GameObject in the scene (a copy of this GameObject)
37.                 GameObject newEmitter = Instantiate(gameObject, transform.position, transform.rotation) as GameObject;
38.                 // Direct EmitMesh() to the played GameObject
39.                 newEmitter.GetComponent<ShurikenBakedMeshEmitter>().EmitMesh();
40.                 // Reset waiting time
41.                 interval = coolDown;
42.             }
43.         // If emit is false
44.         }else{
45.             // Reset waiting time
46.             interval = coolDown;
47.         }
48.     }
49.     // Make particle play by external access
50.     public void EmitMesh () {
51.         // Do not let Update () [false]
52.         emit = false;
53.         // Reset the mesh type
54.         baked = new Mesh();
55.         // Save the current shape of the mesh used
56.         skin.BakeMesh(baked);
57.         // Access to own particle system
58.         particle = GetComponent<ParticleSystem>();
59.         render = GetComponent<ParticleSystemRenderer>();
60.         // Specify the mesh to use in the particle system
61.         render.mesh = baked;
62.         // Playback of particles
63.         particle.Play();
64.         // Instruction to destroy this GameObject
65.         Destroy(gameObject, particle.duration);
66.     }
67. }

I'm thinking maybe it's a bug on unity or something I don't know about graphics on unity so hopefully this is the right forum to ask. Any help will be appreciated.
Thanks

 

Hi, yes I already enabled the read/write setting in the import settings. I'm using Unity 2019.1.9f1. Do you think maybe it's because I missed some settings on particle system because in Unity 2019 is a bit different from the Unity 5? Or do I must use Unity 2019.3?

 

Hi I think I just discovered what caused the problem. The particle system using Default-ParticleSystem by default. And when I changed it to Default-Diffuse the error is gone. Probably there's a problem with the shader used in material Default-ParticleSystem. But sadly by using Default-Dffuse the alpha value in setting Color over Lifetime didin't make it transparent. Do you have any suggestions what shader should I use to make the particle goes transparent?

 

SOLVED!! Create new material > Shader: Mobile/Particles/Alpha Blended > change the material on setting Renderer to your newly created material