Let's look into it, seems like the shaders are finding an error and not compiling.
Is the material on your Sprite Renderer doodle's Shadow Casting Sprite?
Can you do the following:
* Go to the Project window
* Right click the Assets folder at the top
* Click Refresh
* Send me the Editor log https://docs.unity.cn/6000.1/Documentation/Manual/log-files.html
feel free to email me too
I see. The package comes with a Shader Graph shader that should work on all pipelines (on Assets/Shader/URP > poorly named). Can you make sure you have the Shader Graph package installed? Alternatively, the shader Doodle Studio ships with is nothing special: you can make your own material with any other shader that uses a texture and alpha (like Mobile/Particles/Alpha Blended) and the animation will show. Email is fernando.ramallo@gmail.com.
