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