statement elseif {regexp -- {^*$} $cmdprefix]} produces an error
"[10:00:31] invalid bareword "regexp"
in expression "regexp -- {^*$} $cmdprefix]";
should be "$regexp" or "{regexp}" or "regexp(...)" or ...
(parsing expression "regexp -- {^*$} $cmdp...")"

I changed it to elseif {[regexp -- {^*$} $cmdprefix]} and it works.

If autoupdate is on, it comes back