Troubleshooting

Init's errors start with [Init] and name the module and method.

You see	Why	Fix
Network is not a valid member of ReplicatedStorage	a boot script names a folder that doesn't exist	make the folder, or remove the entry
... must return exactly one value	the module doesn't end with return	add return MyModule at the bottom
X:Init() didn't finish within 3s	Init is waiting (WaitForChild, a DataStore, another module)	move the waiting into Start
X:Start() didn't finish within 15s	Start waits a long time	fine if intended (it keeps running); otherwise task.spawn the loop or raise StartTimeout
X:Init() errored: ...	a bug in Init	fix it; that module won't Start until then
Two loaded modules are named "X"	two modules share a name	rename one; both still run
Init.start was already called	two boot scripts on one side	keep one InitServer and one InitClient (the old ReplicatedStorage.Init boots too, see Migrating)
"X" isn't a setting	a typo in the settings table	check Settings

A module never runs

• Its name doesn't match the entry's predicate: Coins isn't loaded by matchesName("Service$"); name it CoinService.
• It's inside another ModuleScript. Only top-level modules (folders are fine) load.
• It has the Ignore attribute.
• It's in a folder no entry lists, or on the wrong side (a Controller in ServerScriptService).
• Turn on Verbose = true to see every module Init loads.

Nothing prints at all

The boot scripts aren't running: InitServer must be a Script in ServerScriptService and InitClient a LocalScript in StarterPlayerScripts, both enabled.