Web Player "Invalid Data File"

Questions & Answers
1

When I try to run my game in the web player it gives me the “Invalid data file” error. If I just upload the .html and the .unity3d files generated from the builder it works fine. But if I host my unity3d file somewhere else (GitHub) and change the .html so it loads the new file the webplayer gives this error. I need to fix that so I can create a facebook app from my game

2

I had this error on some browsers where the server was not letting the file download properly. If the server reports the download is finished before its over you get this error.

Try switching server.