Unreliable Event dropped as its payload is too large. Consider reducing the total size of the arguments.
This warning message lacks any useful information, such as the full (path) name of the event in question, making it hard (…impossible) to trace the cause of the warning.
Solution 1: Look for unreliable remote events, and replace them with default remote events if you suspect that they send too much data (for that also use find in place ctrl+shift+f and look for remotes that might send too much)