Modelling a Böbbel

 From:  Lara (MALA)
10096.33 
On my ring I got a new challenge that I cant do.
I would like to have filleting but the fillet command does not work.
May you take a look why, please?
Best, Mala
P.S.:what I do not understand too is the size of the file...it is so extremely hy in comparison to the others I made until now?!

EDITED: 10 Feb 2021 by MALA