Blank window/message pops up frequently while drawing?

Every 15 seconds or so this message pops up. Its blank. I cant close it myself, it closes automatically after about 2 seconds. Very frustrating!

@sawagi Hi, we answered a similar question here and also provided the solution:

Take your time to verify how this can improve your experience upon using Pencil2D and let us know if there’s anything else you require assistance with.