msfconsole

Bundler could not find compatible versions for gem "activesupport":
In snapshot (Gemfile.lock):
activesupport (= 4.2.11.1)

In Gemfile:
metasploit-framework x86-mingw32 was resolved to 5.0.20, which depends on
activerecord (~> 4.2.6) x86-mingw32 was resolved to 4.2.10, which depends on
activesupport (= 4.2.10) x86-mingw32

rspec-rails x86-mingw32 was resolved to 3.8.2, which depends on
  railties (>= 3.0) was resolved to 4.2.11.1, which depends on
    activesupport (= 4.2.11.1) x86-mingw32

Running bundle update will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

#I try to “gem install activesupport” but nothing

Successfully installed activesupport-5.2.3
Parsing documentation for activesupport-5.2.3
Done installing documentation for activesupport after 5 seconds
1 gem installed