它说我Gemfile.lock的腐败。确切的消息是“您的 Gemfile.lock 已损坏。DEPENDENCIES 部分缺少以下 gem：'mini_portile2'”我将如何解决这个问题？这也是我的Gemfile.lock：
GEM
remote: https://rubygems.org/
specs:
actionmailer (4.2.6)
actionpack (= 4.2.6)
actionview (= 4.2.6)
activejob (= 4.2.6)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 1.0, >= 1.0.5)
actionpack (4.2.6)
actionview (= 4.2.6)
activesupport (= 4.2.6)
rack (~> 1.6)
rack-test (~> 0.6.2)
rails-dom-testing (~> 1.0, >= 1.0.5)
rails-html-sanitizer (~> 1.0, >= 1.0.2)
actionview (4.2.6)
activesupport (= 4.2.6)
builder (~> 3.1)
erubis (~> 2.7.0)
rails-dom-testing (~> 1.0, >= 1.0.5)
rails-html-sanitizer (~> 1.0, >= 1.0.2)
activejob (4.2.6)
activesupport (= 4.2.6)
globalid (>= 0.3.0)
activemodel (4.2.6)
activesupport (= 4.2.6)
builder (~> 3.1)
activerecord (4.2.6)
activemodel (= 4.2.6)
activesupport (= 4.2.6)
arel (~> 6.0)
activesupport (4.2.6)
i18n (~> 0.7)
json (~> 1.7, >= 1.7.7)
minitest (~> 5.1)
thread_safe (~> 0.3, >= 0.3.4)
tzinfo (~> 1.1)
arel (6.0.3)
binding_of_caller (0.7.2)
debug_inspector (>= 0.0.1)
builder (3.2.2)
byebug (5.0.0)
columnize (= 0.9.0)
coffee-rails (4.1.0)
coffee-script (>= 2.2.0)
railties (>= 4.0.0, < 5.0)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.9.1.1)
columnize (0.9.0)
debug_inspector (0.0.2)
erubis (2.7.0)
execjs (2.6.0)
globalid (0.3.6)
activesupport (>= 4.1.0)
i18n (0.7.0)
jbuilder (2.3.1)
activesupport (>= 3.0.0, < 5)
multi_json (~> 1.2)
jquery-rails (4.0.5)
rails-dom-testing (~> 1.0)
railties (>= 4.2.0)
thor (>= 0.14, < 2.0)
json (1.8.3)
loofah (2.0.3)
nokogiri (>= 1.5.9)
mail (2.6.3)
mime-types (>= 1.16, < 3)
mime-types (2.6.1)
minitest (5.8.4)
multi_json (1.11.2)
nokogiri (1.6.7.2)
rack (1.6.4)
rack-test (0.6.3)
rack (>= 1.0)
rails (4.2.6)
actionmailer (= 4.2.6)
actionpack (= 4.2.6)
actionview (= 4.2.6)
activejob (= 4.2.6)
activemodel (= 4.2.6)
activerecord (= 4.2.6)
activesupport (= 4.2.6)
bundler (>= 1.3.0, < 2.0)
railties (= 4.2.6)
sprockets-rails
rails-deprecated_sanitizer (1.0.3)
activesupport (>= 4.2.0.alpha)
rails-dom-testing (1.0.6)
activesupport (>= 4.2.0.beta, < 5.0)
nokogiri (~> 1.6.0)
rails-deprecated_sanitizer (>= 1.0.1)
rails-html-sanitizer (1.0.3)
loofah (~> 2.0)
railties (4.2.6)
actionpack (= 4.2.6)
activesupport (= 4.2.6)
rake (>= 0.8.7)
thor (>= 0.18.1, < 2.0)
rake (10.5.0)
rdoc (4.2.1)
sass (3.4.21)
sass-rails (5.0.4)
railties (>= 4.0.0, < 5.0)
sass (~> 3.1)
sprockets (>= 2.8, < 4.0)
sprockets-rails (>= 2.0, < 4.0)
tilt (>= 1.1, < 3)
sdoc (0.4.1)
json (~> 1.7, >= 1.7.7)
rdoc (~> 4.0)
spring (1.3.6)
sprockets (3.3.0)
rack (~> 1.0)
sprockets-rails (2.3.2)
actionpack (>= 3.0)
activesupport (>= 3.0)
sprockets (>= 2.8, < 4.0)
sqlite3 (1.3.11)
thor (0.19.1)
thread_safe (0.3.5)
tilt (2.0.1)
turbolinks (2.5.3)
coffee-rails
tzinfo (1.2.2)
thread_safe (~> 0.1)
uglifier (2.7.2)
execjs (>= 0.3.0)
json (>= 1.8.0)
web-console (2.2.1)
activemodel (>= 4.0)
binding_of_caller (>= 0.7.2)
railties (>= 4.0)
sprockets-rails (>= 2.0, < 4.0)
PLATFORMS
ruby
DEPENDENCIES
byebug
coffee-rails (~> 4.1.0)
jbuilder (~> 2.0)
jquery-rails
rails (= 4.2.6)
sass-rails (~> 5.0)
sdoc (~> 0.4.0)
spring
sqlite3
turbolinks
uglifier (>= 1.3.0)
web-console (~> 2.0)
BUNDLED WITH
1.11.2
我将如何解决这个问题？如果您需要更多信息，我愿意提供！