cant trim

[itsdiia]

i got this error when i try to trim, what can I do?

Lua reported a runtime error: File "C:/Program Files\Aegisub\automation\autoload\a-mo.Aegisub-Motion.moon", line 613 <anonymous function at lines 579-618> File "C:/Users\Freeeeeee\AppData\Roaming\Aegisub\automation\include\a-mo\TrimHandler.moon", line 165 performTrim File "C:/Program Files\Aegisub\automation\include\unicode-monkeypatch.lua", line 94 open File "C:/Program Files\Aegisub\automation\include\unicode-monkeypatch.lua", line 52 widen attempt to concatenate global 'fname' (a nil value)