Having trouble with a RGB File: error message and unable to change in to a greysdale image

[donnchaidh]

An error comes up that the tool I want to use will not work because the quick mask is not turned on. I dont think I made the layer into a quick mask. How do I undo this? Also the image mode is greyed out and not functioning. Thank you in advance.

[Bienvenido5CE8]

Hola tengo la aplicación de photoshop CC pero me aparece un cuadro diálogo que dice que esta bloqueado y no me permite guardar los cambios 

[donnchaidh]

OK. You should start a new intry

[D Fosse]

Press Q to get out of Quick Mask.