Error with open dialog

[jugendhacker]

I don't know the problem but the console showed me this error:

draw.js:475 Uncaught TypeError: Cannot read property 'length' of undefined
    at dialog.showOpenDialog (draw.js:475)
    at CallbacksRegistry.apply (C:\Users\...\AppData\Local\Temp\nsa13CB.tmp\app\resources\electron.asar\common\api\callbac…:48)
    at EventEmitter.<anonymous> (C:\Users\...\AppData\Local\Temp\nsa13CB.tmp\app\resources\electron.asar\renderer\api\remot…:299)
    at emitThree (events.js:116)
    at EventEmitter.emit (events.js:197)
draw.js:475 Uncaught TypeError: Cannot read property 'length' of undefined
    at dialog.showOpenDialog (draw.js:475)
    at CallbacksRegistry.apply (C:\Users\...\AppData\Local\Temp\nsa13CB.tmp\app\resources\electron.asar\common\api\callbac…:48)
    at EventEmitter.<anonymous> (C:\Users\...\AppData\Local\Temp\nsa13CB.tmp\app\resources\electron.asar\renderer\api\remot…:299)
    at emitThree (events.js:116)
    at EventEmitter.emit (events.js:197)

[jugendhacker]

I think that was just a weired thing with the PC we used yesterday, because I can't reproduce this!