Traceback (most recent call last):
    2: from start-bot.rb:15:in `<main>'
    1: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- rspotify (LoadError)
    5: from start-bot.rb:15:in `<main>'
    4: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:34:in `require'
    3: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:123:in `rescue in require'
    2: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems.rb:217:in `try_activate'
    1: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/specification.rb:1418:in `activate'
/usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/specification.rb:2302:in `raise_if_conflicts': Unable to activate rspotify-2.6.0, because rest-client-2.1.0.rc1 conflicts with rest-client (~> 2.0.2) (Gem::ConflictError)
    6: from start-bot.rb:15:in `<main>'
    5: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:34:in `require'
    4: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:123:in `rescue in require'
    3: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems.rb:216:in `try_activate'
    2: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems.rb:223:in `rescue in try_activate'
    1: from /usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/specification.rb:1418:in `activate'
/usr/local/Cellar/ruby/2.6.3/lib/ruby/2.6.0/rubygems/specification.rb:2302:in `raise_if_conflicts': Unable to activate rspotify-2.6.0, because rest-client-2.1.0.rc1 conflicts with rest-client (~> 2.0.2) (Gem::ConflictError)