Problem:
You want to compile a LaTeX file containing CircuiTikZ code but you get the following error:
LaTeX Error: Unknown option `fetbodydiode' for package `circuitikz'
Solution:
You have an outdated CircuiTikZ version (fetbodydiode
is in TeXLive 2016+). Depending on your distribution, there are several ways to update CircuiTikZ: