So I just downloaded gimp today and I also downloaded Script-fu. But now when I try to use layer effects it doesn't work. For example, when I tried to use bevel and emboss it said

Plug-In 'Bevel and Emboss' left image undo in inconsistent state, closing open undo groups.

then

Error while executing script_fu_layer_effects_bevel_and_emboss:

Error: (<unknown> : 42105430) Procedure execution of gimp-selection-layer-alpha failed on invalid input arguments: Item 'Keys' (50) cannot be used because it has not been added to an image

What does this mean and how do I fix it?

please please help

what website did you go to and what did you search to get there

flights, you can find it here: http://gimpscripts.com/2011/10/gimp-layer-effects/