Here is the jslib plugin: https://paste.ofcode.org/zbQ4LxvU2uFBPrRENWh7zX
Here is the WebGL Save C# class Wrapper: https://paste.ofcode.org/WEpLXei45wBqUNyx34Nisa
Here is the save backend: https://paste.ofcode.org/zMzveruLFSbJedMbhhkjgP
Here is the actual data saver for the ingame data: https://paste.ofcode.org/3bgWvNiDkh6z56b8Uq3cDpS
Currently DownloadFile only exists in the singular jslib plugin, and I have cleared the WebGL artifacts already.
Here is the full error: