PaulUsul

Hey I'm running into the same issue, did you ever find a solution/workaround? I'm on an iPad and I've got permission in Settings -> Privacy & Security -> Local Network

Yeah I think that's the case. I've applied for com.apple.developer.networking.multicast, let's hope that helps an info thread here: https://developer.apple.com/forums/thread/714211 Local Network Privacy FAQ: https://developer.apple.com/forums/thread/663858 Using the Multicast Networking Additional Capability:...

and you can apply for the entitlement from here https://developer.apple.com/documentation/bundleresources/entitlements/com_apple_developer_networking_multicast

If anyone else ever needs Unity WebGL support I've forked and added rough UnityWebRequest usage here https://github.com/SeriousGamesInteractive/TinCan.NET