Is this a try of exploit?
You’re basically calling a value that is nil ( aka. nothing at all )
That does look like someone tried to run an exploit in your game, apparently with a variation of Synapse. It won’t be Synapse itself since Roblox bought them out.
The script name and the function look suspicious, which tells me it is likely an exploit.
The generic error “Attempt to call a nil value” is when you try to call a variable that is pointing to the value nil instead of a function.
Like this:
nil() --> attempt to call a nil value
local func
func() --> attempt to call a nil value
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Yes, it is a script kiddie trying to exploit in your game.
Yeppp, that would indeed be someone trying to cheat
Synapse Xen was a script obfuscation service Synapse used to offer that was discontinued years ago
(ik this is old just want to add context incase anyone else visits this)
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someone tried to run code using the Xeno executor which is an external program that allows a user to inject arbitrary luaU code into the client. this code was obfuscated using a product called Synapse Xen (discontinued June 25 2025). either the original code already contained an error or the obfuscator has broken. nonetheless if you have the username you can ban them