Error map
LoadError: cannot load such file Ruby: LoadError: cannot load such file -- nokogiri (or: cannot load such file -- bundler/setup)
Ruby / Rails · layer 4, Application & API
Centre: this error. First ring: errors it is linked with (11). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (11)
Bundler: Bundler could not find compatible versions for gem "activesupport": In Gemfile: rails (= 7.1.0) depends on activesupport (= 7.1.0)
Two gems in your Gemfile require incompatible versions of a shared dependency.
Rake: rake aborted! Don't know how to build task 'db:migrat' (See the list of available tasks with `rake --tasks`)
Rake doesn't know the task name — a typo, a missing Rakefile, or a gem/engine not loaded.
Ruby: NameError: uninitialized constant UsersController::User (Did you mean? Users)
Ruby (or Rails autoloading) couldn't find a class or module with that name in the current scope.
Ruby: ArgumentError: wrong number of arguments (given 1, expected 2..3)
A method was called with more or fewer arguments than it accepts.
Ruby: ArgumentError: missing keyword: :name / unknown keyword: :nmae
A method requiring keyword arguments was called without them, or with a misspelt keyword.
Bundler: Could not find gem 'rails (~> 7.1)' in locally installed gems / Could not find rails-7.1.0 in any of the gem sources listed in your Gemfile
A gem from the Gemfile/Gemfile.lock isn't installed (or isn't available at that version).
Ruby: ERROR: Failed to build gem native extension. current directory: /gems/pg-1.5.4/ext/pg — An error occurred while installing pg
A gem with C code couldn't compile, usually because a system library or header is missing.
Bundler: Your bundle only supports platforms ["x86_64-linux"] but your local platform is arm64-darwin / Could not find gem 'nokogiri (1.16.0-arm64-darwin)'
The lockfile has no Nokogiri build for the current platform (precompiled "native" gems are per platform).
Bundler: Your Ruby version is 3.1.2, but your Gemfile specified 3.3.0
`.ruby-version`/the Gemfile `ruby` line requires a different Ruby than the one running.
Rails: ActiveRecord::ConnectionNotEstablished: No connection pool for 'ActiveRecord::Base' found
ActiveRecord has no database connection configured or established for this process.
Rails: Zeitwerk::NameError: expected file app/models/user_profile.rb to define constant UserProfile, but didn't
Rails autoloading found a file whose name implies a constant the file doesn't define.
Two steps away (21)
Unmet dependencies / E: Unable to correct problems, you have held broken packages
apt can’t find a set of package versions that satisfies all dependencies — usually mixed repositories or a package from another r…
Ruby: TypeError: no implicit conversion of nil into String
A String method (`+`, `File.join`, `Array#join` usage) received `nil` instead of a string.
Ruby: TypeError: nil can't be coerced into Integer / String can't be coerced into Integer
Arithmetic combined a number with `nil` (or a String) which Ruby can't convert automatically.
RSpec: expected: 200 got: 404 (compared using ==) — RSpec::Expectations::ExpectationNotMetError
An RSpec `expect` assertion didn't hold: the actual value differs from what the test expected.
FactoryBot: FactoryBot::DuplicateDefinitionError: Factory already registered: user
Two factory definitions use the same name (or files are loaded twice).
Ruby: NoMethodError: undefined method `x' for nil (nil:NilClass)
You called a method on nil — the object you expected (a record, hash value, param) wasn’t there.
Ruby: NameError: undefined local variable or method 'x' for main:Object
Ruby saw a bare identifier that is neither a local variable nor a method on the current object.
Rails: ActiveRecord::Deadlocked: PG::TRDeadlockDetected: ERROR: deadlock detected
Two transactions locked rows in opposite orders, so PostgreSQL aborted one.
macOS: ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory
`gem install` tries to write into Apple's system Ruby, which is protected and shouldn't be modified.
Ruby: FrozenError: can't modify frozen String: "abc"
You tried to change an object that's frozen — string literals under `# frozen_string_literal: true`, constants, symbols or frozen…
Ruby: OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)
Ruby's HTTP client (Net::HTTP, Faraday, gem install) couldn't verify the server's certificate.
Rails: ActionController::ParameterMissing: param is missing or the value is empty: user
`params.require(:user)` found no `user` key (or it was blank), so Rails responds 400.
macOS: ld: library 'ssl' not found / ld: library not found for -lssl (clang: error: linker command failed)
The linker can't find OpenSSL (or another library) because Homebrew libraries aren't on its search path.
macOS: dlopen: mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64')
A library or binary was built for a different CPU architecture than the process loading it.
Error response from daemon: client version 1.45 is too new. Maximum supported API version is 1.41
Your Docker CLI (or SDK) speaks a newer API version than the Docker daemon it’s talking to.
Rails: ActionController::InvalidAuthenticityToken (Can't verify CSRF token authenticity)
A non-GET request arrived without a valid CSRF token for the session.
Redis: Error: connect ECONNREFUSED 127.0.0.1:6379 / Could not connect to Redis at 127.0.0.1:6379: Connection refused
Nothing is listening on the Redis host/port your client uses.
Redis: Error: write EPROTO ... SSL routines:ssl3_get_record:wrong version number / Connection reset by peer (TLS vs plaintext)
The client and server disagree about TLS — plaintext client to a TLS port, or TLS client to a plaintext port.
Rails: ActiveRecord::IrreversibleMigration — This migration uses remove_column without a type; db:rollback can't reverse it
`rails db:rollback` can't undo the migration because it contains an operation Rails can't invert.
Rails: Asset `application.js` was not declared to be precompiled in production / The asset "application.css" is not present in the asset pipeline
A layout references an asset that Sprockets doesn't know to compile or can't find.
Rails: ActiveRecord::AssociationTypeMismatch: User(#1234) expected, got "42" which is an instance of String(#5678)
You assigned the wrong kind of object (or an id string) to an association.
Map another error
Popular: 500403400ORA-009331064Critical errorFileNotFoundException assemblyTypeError