The Photon Forum
is Closed Permanently.

After many dedicated years of service, we have made the decision to retire our Forum and switch to read-only: we´ve saved the best to last! Your search result can be found below. Plus, we offer support via these channels:

Try Our

Please check if you can find an answer in our extensive documentation on Fusion.

Join Us
on Discord

Meet and talk to our staff and the entire Photon-Community via Discord.

Stack Overflow

Find more information on Stack Overflow (for Circle members only).

Write Us
an E-Mail

Feel free to send your question directly to our developers.

NullReferenceException on StartGame

2022-02-11 13:46:34


I wanted to start using Photon Fusion today and walked through the Getting Started section. I simply got the latest version (Photon-Fusion-0.13.0-RC-Nightly-406) on Unity version 2021.1.6f1 and also installed mono.cecil to a fresh 3d hdrp project. I created my AppId and used the wizard to store it. I simply almost copy and pasted the "Fusion 102 - Setting Up A Scene - Launching Fusion"-Code. But after "_launcher.StartGame" is called, NullReferenceException was thrown and the NetworkRunner shuts down.


Even if i use the Feature "Fusion -> GameObject -> Setup Basic Fusion Scene" without my own Scripts/GameObjects, the same errors occur.

All my scenes are added to the Build-Settings aswell.

My code, but as i said, the same thing:

I hope someone can help me with this issue.

Best regards


2022-02-11 16:09:36

It would be good to see the complete callstack of the error.

I would suggest to update the Fusion SDK to latest. While I don't see if one of the fixes helps in this case, there are several.

Last but not least, we will double check our Getting Started doc with the latest version.

2022-02-11 16:24:50

Thanks for answering. I asked this some days ago, so in the mean time it "resvolved" itself (Posts are taking long time for being approved..)

For anybody wondering: It was an actual bug in the NetworkRunner, there was an incorrect null-check at the AddBehavior method. But Version 0.13.0 Build 408 (and above i hope) fixes that problem. Build 406 only got this issue.

2022-02-11 16:27:44

Sometimes our devs are too busy and forget to check the forum.

Thanks for your update! Glad you checked out the updated SDK.

Back to top