That's... interesting. Try turning off the internet when launching the game. If that doesn't help, click "Copy" in that window and send it here in the comments.
Sure boss.. this is what i "copy"
I already tried entering the game with wifi and data cell turned off
Android:0.5.9 (Avifors)
NullReferenceException: Object reference not set to an instance of an object.
Live2D.Cubism.Rendering.Masking.CubismMaskTexture.Live2D.Cubism.Rendering.Masking.ICubismMaskCommandSource.AddToCommandBuffer (UnityEngine.Rendering.CommandBuffer buffer, System.Boolean isUsingMultipleBuffer, System.Int32 renderTextureIndex) (at <00000000000000000000000000000000>:0)
Live2D.Cubism.Rendering.Masking.CubismMaskCommandBuffer.RefreshCommandBuffer () (at <00000000000000000000000000000000>:0)
Live2D.Cubism.Rendering.Masking.CubismMaskCommandBuffer.LateUpdate () (at <00000000000000000000000000000000>:0)