eraser doesn't work in layer mask

[Jotter54]

I've been using PSE 13 for a few years now, last week the eraser stopped working when I'm erasing in a mask layer. The eraser works OK in a picture, or in a layer, but the moment I try to erase in a layer mask, it just doesn't work any more.

I didn't change settings..... Tried restore tool settings, tried a new install of PSE 13, nothing helped!

What can possibly be wrong in the program settings related to the layer mask that prefends the eraser from working??

Thanks for any help

[Jeff Arola · Accepted solution]

Make sure the Foreground color in the toolbox is set to White to erase on a layer mask with the Eraser Tool.

[Jotter54]

Thanks a lot ! This was the answer, it's working again

[Hafiz5FF2]

Make sure the foreground color is set to white and background color is set to black. 

[expensivec43330229]

Thank you so much my friend, this worked here perfectly!!!!!

[Hafiz5FF2]

Make sure the foreground color is set to white and background color is set to black.