Describe the issue

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An error has occurred!
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Running: The timer handler.
A stack trace is included below, and the handler has been disconnected.
F:\Archivos de programa\CorsixTH\Lua\world.lua:1804: bad argument #2 to 'findObject' (number expected, got nil)
stack traceback:
[C]: in method 'findObject'
F:\Archivos de programa\CorsixTH\Lua\world.lua:1804: in method 'findObjectNear'
F:\Archivos de programa\CorsixTH\Lua\entities\staff.lua:186: in method 'tick'
F:\Archivos de programa\CorsixTH\Lua\world.lua:1075: in method 'onTick'
F:\Archivos de programa\CorsixTH\Lua\app.lua:1000: in function <F:\Archivos de programa\CorsixTH\Lua\app.lua:997>
(...tail calls...)
F:\Archivos de programa\CorsixTH\Lua\app.lua:901: in function <F:\Archivos de programa\CorsixTH\Lua\app.lua:896>

Warning: No event handler for timer

System Information

CorsixTH Version: 0.60

Operating System: Windows 10*

Theme Hospital Version: CD

Additional Info