cocoapods installation error with brew

[m1s3rys1gn4l]

i have installed homebrew on my bigSur
and installed cocoapods from brew,
after installation i have tried to run command pod setup
then i got this error bellow, pleaes some one help me to resolve this issue

m1s3ry@Sohanurs-iMac ~ % pod setup
Traceback (most recent call last):
    16: from /usr/local/Cellar/cocoapods/1.11.3/libexec/bin/pod:23:in `<main>'
    15: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `activate_bin_path'
    14: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `synchronize'
    13: from /Library/Ruby/Site/2.6.0/rubygems.rb:286:in `block in activate_bin_path'
    12: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
    11: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
    10: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
     9: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1405:in `block in activate_dependencies'
     8: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
     7: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
     6: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
     5: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1405:in `block in activate_dependencies'
     4: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
     3: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
     2: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
     1: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1399:in `block in activate_dependencies'
/Library/Ruby/Site/2.6.0/rubygems/dependency.rb:311:in `to_specs': Could not find 'minitest' (>= 5.1) among 39 total gem(s) (Gem::MissingSpecError)
Checked in 'GEM_PATH=/Users/m1s3ry/.local/share/gem/ruby/2.6.0:/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0:/usr/local/Cellar/cocoapods/1.11.3/libexec' , execute `gem env` for more information
    16: from /usr/local/Cellar/cocoapods/1.11.3/libexec/bin/pod:23:in `<main>'
    15: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `activate_bin_path'
    14: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `synchronize'
    13: from /Library/Ruby/Site/2.6.0/rubygems.rb:286:in `block in activate_bin_path'
    12: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
    11: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
    10: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
     9: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1405:in `block in activate_dependencies'
     8: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
     7: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
     6: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
     5: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1405:in `block in activate_dependencies'
     4: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1369:in `activate'
     3: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `activate_dependencies'
     2: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1387:in `each'
     1: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1398:in `block in activate_dependencies'
/Library/Ruby/Site/2.6.0/rubygems/specification.rb:1401:in `rescue in block in activate_dependencies': Could not find 'minitest' (>= 5.1) among 39 total gem(s) (Gem::MissingSpecError)
Checked in 'GEM_PATH=/Users/m1s3ry/.local/share/gem/ruby/2.6.0:/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0:/usr/local/Cellar/cocoapods/1.11.3/libexec' at: /usr/local/Cellar/cocoapods/1.11.3/libexec/specifications/activesupport-6.1.5.gemspec, execute `gem env` for more information