Add stack trace for the warning "The player with userId=xxx is not present at the moment"

[EtNowis]

As a Roblox developer, it is currently too hard to know what causes this warning because it has no stack trace.

If Roblox is able to address this issue, it would improve my development experience because we can know which scripts and functions we called that causes it. So that we can fix them.

[WinterStorm_Meow (Winter)]

I feel like this would be good as a bug report rather than a feature request. But I 100% agree that there should be a stack trace to all warnings.