What do i do with this erro?
"Colour type PALETTE but A is required"

There are two types of PNGs used for modelling in LFS, one is RGB and the other is RGBA (with alpha/transparency). You are supplying an RGB type where the editor expects an RGBA type.

It's explained in this thread: https://www.lfs.net/forum/thread/96373

how can fix it ???

If u use gimp you can export your png rgb easily

Just flattern image in GIMP or add _ALP at the end of texture name