I keep getting this error when I refresh my character, but when I search PrivateServerOwnerId it only shows up in server scripts. The error also doesn’t say the line or script that’s triggering it.
That’s weird. The error is clearly stating there was an attempt to access PrivateServerOwnerId from the client.
Check your client-side scripts (especially ModuleScripts called from the client), one by one. If you don’t find any possible cause, I recommend you to search in all scripts for PrivateServerOwnerId and analyze the context where each is called.
The best of luck! 