Error: starting logstash after installation

Elastic Stack Logstash
1

bin/logstash -e 'input { stdin { } } output { stdout {} }'
/bin/which: invalid option -- 'X'
/bin/which: invalid option -- 'X'
/bin/which: invalid option -- ':'
/bin/which: invalid option -- '+'
/bin/which: invalid option -- 'U'
/bin/which: invalid option -- 's'
/bin/which: invalid option -- 'e'
/bin/which: invalid option -- 'P'
/bin/which: invalid option -- 'r'
/bin/which: invalid option -- 'N'
/bin/which: invalid option -- 'e'
/bin/which: invalid option -- 'w'
/bin/which: invalid option -- 'G'
/bin/which: invalid option -- 'C'
/bin/which: invalid option -- 'X'
/bin/which: invalid option -- 'X'
/bin/which: invalid option -- ':'
/bin/which: invalid option -- '+'
/bin/which: invalid option -- 'U'
/bin/which: invalid option -- 's'
/bin/which: invalid option -- 'e'
/bin/which: invalid option -- 'C'
/bin/which: invalid option -- 'o'
/bin/which: invalid option -- 'n'
/bin/which: invalid option -- 'c'
/bin/which: invalid option -- 'M'
/bin/which: invalid option -- 'r'
/bin/which: invalid option -- 'k'
/bin/which: invalid option -- 'S'
/bin/which: invalid option -- 'w'
/bin/which: invalid option -- 'e'
/bin/which: invalid option -- 'e'
/bin/which: invalid option -- 'p'
/bin/which: invalid option -- 'G'
/bin/which: invalid option -- 'C'
/bin/which: invalid option -- 'D'
/bin/which: invalid option -- 'j'
GNU which v2.20, Copyright (C) 1999 - 2008 Carlo Wood.
GNU which comes with ABSOLUTELY NO WARRANTY;
This program is free software; your freedom to use, change
and distribute this program is protected by the GPL.

2

Where is the which being called from?
What version did you install? How did you install it? What OS? What java version?