Getting error while trying to set up ttl

[sandeep173254]

skhatri@Sandeeps-MacBook-Pro defender % helm release ttl defender --set='2 days'
/Users/skhatri/Library/helm/plugins/helm-release-plugin/lib/main.sh: line 13: declare: -A: invalid option
declare: usage: declare [-afFirtx] [-p] [name[=value] ...]
error: [ /Users/skhatri/Library/helm/plugins/helm-release-plugin/lib/main.sh at line 9 ]
date: illegal option -- -
usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
[-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
date: illegal option -- -
usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
[-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
date: illegal option -- -
usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
[-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
The CronJob "defender-ttl" is invalid: spec.schedule: Required value
error: [ /Users/skhatri/Library/helm/plugins/helm-release-plugin/release.sh at line 20 ]
Error: plugin "release" exited with error