Uploaded sprite can't set bones and poses

Question

I'm trying to get a sprite by uploading a texture using this script :

 IEnumerator UpdatePNG(string path){
         UnityWebRequest pngWR = new UnityWebRequest("file:///" + path);
         DownloadHandlerTexture texDl = new DownloadHandlerTexture(true);
         pngWR.downloadHandler = texDl;
         yield return pngWR.SendWebRequest();
         if (pngWR.result == UnityWebRequest.Result.Success) {
             Texture2D t = texDl.texture;
             Sprite s = Sprite.Create(t, new Rect(0, 0, t.width, t.height), new Vector2(.5f, .5f), 100f, 100, SpriteMeshType.Tight);
 
             pngSwapper.InjectCustom(s);
         }
     }

After uploading, the method calls InjectCustom();

 public void InjectCustom (Sprite customSprite){
         // Duplicate bones and poses
         string referenceLabel = targetResolver.GetLabel();
         Sprite referenceHead =
         spriteLibrary.GetSprite(targetCategory, referenceLabel);
         SpriteBone[] bones = referenceHead.GetBones();
         NativeArray<Matrix4x4> poses = referenceHead.GetBindPoses();
         customSprite.SetBones(bones);
         customSprite.SetBindPoses(poses);
 
         // Inject new sprite
         const string customLabel = "customHead";
         spriteLibrary.AddOverride(customSprite, targetCategory, customLabel);
         targetResolver.SetCategoryAndLabel(targetCategory, customLabel);
         
     }

If the sprite used by InjectCustom() is already in Unity, it'll work and attach itself to the bones but if I use the uploaded sprite it returns this error

 IndexOutOfRangeException: Index -1079236362 is out of range of '1' Length.
 Unity.Collections.NativeArray`1[T].FailOutOfRangeError (System.Int32 index) (at <13e6546058e340ada820e34dce3b245e>:0)
 Unity.Collections.NativeArray`1[T].CheckElementReadAccess (System.Int32 index) (at <13e6546058e340ada820e34dce3b245e>:0)
 Unity.Collections.NativeArray`1[T].get_Item (System.Int32 index) (at <13e6546058e340ada820e34dce3b245e>:0)
 UnityEngine.U2D.Animation.SpriteSkinUtility.Deform (Unity.Mathematics.float4x4 rootInv, Unity.Collections.NativeSlice`1[T] vertices, Unity.Collections.NativeSlice`1[T] boneWeights, Unity.Collections.NativeArray`1[T] boneTransforms, Unity.Collections.NativeSlice`1[T] bindPoses, Unity.Collections.NativeSlice`1[T] deformed) (at Library/PackageCache/com.unity.2d.animation@7.0.4/Runtime/SpriteSkinUtility.cs:249)
 UnityEngine.U2D.Animation.SpriteSkinUtility.Deform (UnityEngine.Sprite sprite, UnityEngine.Matrix4x4 rootInv, Unity.Collections.NativeSlice`1[T] vertices, Unity.Collections.NativeSlice`1[T] tangents, Unity.Collections.NativeSlice`1[T] boneWeights, Unity.Collections.NativeArray`1[T] boneTransforms, Unity.Collections.NativeSlice`1[T] bindPoses, Unity.Collections.NativeArray`1[T] deformableVertices) (at Library/PackageCache/com.unity.2d.animation@7.0.4/Runtime/SpriteSkinUtility.cs:220)
 UnityEngine.U2D.Animation.SpriteSkinUtility.Deform (UnityEngine.Sprite sprite, UnityEngine.Matrix4x4 invRoot, UnityEngine.Transform[] boneTransformsArray, Unity.Collections.NativeArray`1[T] deformVertexData) (at Library/PackageCache/com.unity.2d.animation@7.0.4/Runtime/SpriteSkinUtility.cs:313)
 UnityEngine.U2D.Animation.SpriteSkin.LateUpdate () (at Library/PackageCache/com.unity.2d.animation@7.0.4/Runtime/SpriteSkin.cs:311)

Answer 1

Solved it! I uploaded the png as a file instead and then loaded it through Resource.Load() after calling AssetDatabase.Refresh()

 IEnumerator UploadPNG(string path){
         UnityWebRequest www = UnityWebRequest.Get(path);
         yield return www.SendWebRequest();
 
         if(www.result == UnityWebRequest.Result.ProtocolError){
             Debug.Log(www.error);
         }
         else{
             byte[] bytes = www.downloadHandler.data;
             string fileName = Path.GetFileName(path);
             string fileName2 = Path.GetFileNameWithoutExtension(path);
             string filePath = Path.Combine(Application.dataPath, "Resources/PNGs/" + fileName);
             string filePath2 = Path.Combine("PNGs/" + fileName2);
             File.WriteAllBytes(filePath, bytes);
             Debug.Log("File saved to: " + filePath);
 
             AssetDatabase.Refresh();
             latestUpload = filePath;
             pngSwapper.LoadUploadedSprite(filePath2);
         }
     }

Uploaded sprite can't set bones and poses

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