- I am trying to upload my project to Unity Play, but I keep getting the error "Invalid Parameter".
The error “Invalid Parameter” means there’s no WebGL Build in the .zip file you are trying to upload. Unity Play only accepts WebGL Build .zip files.
In order to upload your project to Unity Play, you need to create a WebGL build.
For the full steps on how to create a WebGL build, see the Unity Learn tutorial "How to publish for WebGL".