init.lua has errors

While trying to trace and debug a script I'm working on, FSUIPC4 detected something going on with init.lua (located in C:\Steam\steamapps\common\FSX\Modules\linda\system). The date of the file is 9/23/2018, so it isn't as if I've accidentally modified it. The particular error is: 

Syntax error!

...steamapps\common\FSX\Modules\linda\system\common.lua:109:
    attempt to call global 'buttonRepeatClear' (a nil value)
stack traceback:
    ...steamapps\common\FSX\Modules\linda\system\common.lua:109: in function 'Init'
    ...Steam\steamapps\common\FSX\Modules
Line: 287: in main chunk