Catalina: /usr/sbin/accept command not found
Prior to macOS Catalina the accept command was a symlink to cupsaccept. So in macOS Catalina, use:
/usr/sbin/cupsaccept
In macOS Mojave, in Terminal:
$ which accept
/usr/sbin/accept
$ ls -l /usr/sbin/accept
lrwxr-xr-x 1 root wheel 10 Sep 7 21:22 /usr/sbin/accept -> cupsaccept
$
In macOS Catalina, in Terminal:
% which cupsaccept
/usr/sbin/cupsaccept
%