Bevel modifier error

Hello,

I’m at a loss.

Image 1 - Very basic shape. L-shaped counter top. No double verts, nothing is overlapping, scale has been applied, etc. etc.

Image 2 - Zoomed in on a corner. I wanted to add a bevel modifier, so I did. Now I get this mess and I have no idea why, but I’m sure it’s something simple.

F***ing heck. I figured it out.

ONE normal was flipped and the default width was too high. Case closed.