"Invalid value for enum KeyCode" - ChatScript2 Error

I’ve been seeing these pop up in Google Analytics. No clue what it means but it’s an error of some kind.

I am still getting a couple hundred of these errors every day in my Google Analytics:
Invalid value for enum KeyCode | CoreGui.RobloxGui.Modules.BackpackScript, line 1022 - function OnInputBegan
Invalid value for enum KeyCode | CoreGui.RobloxGui.Modules.Settings.SettingsHub, line 1990
Invalid value for enum KeyCode | CoreGui.RobloxGui.Modules.Settings.Utility, line 2093 - function processInput
Invalid value for enum KeyCode | Players..PlayerScripts.ChatScript.ChatMain.ChatBar, line 171
Invalid value for enum KeyCode | CoreGui.RobloxGui.Modules.Settings.SettingsHub, line 1253
Argument 1 missing or nil | CoreGui.RobloxGui.Modules.PlayerPermissionsModule, line 143

No idea how to repro.

You should file a new bug report, this one is not discoverable (posted in 2015, core scripts have been completely overhauled at least 2 times since then)