elpa-zzz-to-char in Buster

[asmegir <asmegir@gmail.com>]

I'm getting what seems to be odd behavior with elpa-zzz-to-char 0.1.3-1 
on 26.1+1-3.2 in Buster.  Calling either zzz-to-char or zzz-up-to-char
gets a "Zzz (up) to: " prompt but any input just results in a
"Unexpected style XYZ" message where XYZ is a seemingly arbitrary 3-
digit number. Is this a feature I'm misunderstanding?  Or a bug?

Damon Thomas