fastlane: Pilot fails with error 'What to Test is required. What to Test is required. Validation errors' when 'Distributing new build to testers'

New Issue Checklist

• Updated fastlane to the latest version
• I have read the Contribution Guidelines

Issue Description

Complete output when running fastlane, including the stack trace and command used

The lane worked well for a long time, but after iTunesConnect update it started to fail on distributing build to testers.

pilot section looks like:

pilot(
      changelog: "release notes",
      beta_app_description: "MyProject app for iPad",
      beta_app_feedback_email: "email@domain.com",
      update_build_info_on_upload: true,
      distribute_external: true
      )

Command invoked: $ fastlane stage

Piece of console output:

[00:05:38]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:06:10]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:06:43]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:07:16]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:07:49]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:08:37]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:09:10]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:09:42]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:10:16]: Waiting for iTunes Connect to finish processing the new build (1.1.0 - 7)
[00:10:46]: Successfully finished processing the build
[00:10:46]: You can now tweet: 
[00:10:46]: iTunes Connect #iosprocessingtime 15 minutes
[00:10:46]: Distributing new build to testers
+-----------------------------------+--------------------------------------------------------------+
|                                           Lane Context                                           |
+-----------------------------------+--------------------------------------------------------------+
| DEFAULT_PLATFORM                  | ios                                                          |
| PLATFORM_NAME                     | ios                                                          |
| LANE_NAME                         | ios stage                                                    |
| GIT_REPO_WAS_CLEAN_ON_START       | true                                                         |
| GET_INFO_PLIST_VALUE_CUSTOM_VALUE | 1.1.0                                                        |
| VERSION_NUMBER                    | 1.1.0                                                        |
| LATEST_BUILD_NUMBER               | 6                                                            |
| LATEST_TESTFLIGHT_BUILD_NUMBER    | 6                                                            |
| BUILD_NUMBER                      | 7                                                            |
| CERT_FILE_PATH                    | /private/var/jenkins-osx/workspace/myproject-... |
| CERT_CERTIFICATE_ID               | 64J473RRKY                                                   |
| SIGH_PROFILE_PATH                 | /private/var/jenkins-osx/workspace/myproject-... |
| SIGH_PROFILE_PATHS                | ["/private/var/jenkins-osx/workspace/myproj... |
| SIGH_UDID                         | 8d969018-aae3-40a2-b155-93cc9604e3a8                         |
| SIGH_UUID                         | 8d969018-aae3-40a2-b155-93cc9604e3a8                         |
| SIGH_PROFILE_TYPE                 | app-store                                                    |
| IPA_OUTPUT_PATH                   | /private/var/jenkins-osx/workspace/myproject-... |
| DSYM_OUTPUT_PATH                  | /private/var/jenkins-osx/workspace/myproject-... |
| XCODEBUILD_ARCHIVE                | /Users/Shared/Jenkins/Library/Developer/Xcode/Archives/20... |
| READ_CHANGELOG_CHANGELOG_PATH     | ./CHANGELOG.md                                               |
| READ_CHANGELOG_SECTION_CONTENT    | Fixed                                                        |
|                                   | - myproject-464 Selected element is not highlighted          |
+-----------------------------------+--------------------------------------------------------------+
[00:10:49]: [Swedish]: What to Test is required. What to Test is required. Validation errors

+------+-------------------------------------+-------------+
|                     fastlane summary                     |
+------+-------------------------------------+-------------+
| Step | Action                              | Time (in s) |
+------+-------------------------------------+-------------+
| 1    | Verifying required fastlane version | 0           |
| 2    | default_platform                    | 0           |
| 3    | cocoapods                           | 1           |
| 4    | ensure_git_status_clean             | 0           |
| 5    | get_version_number_from_plist       | 7           |
| 6    | latest_testflight_build_number      | 10          |
| 7    | increment_build_number              | 0           |
| 8    | cert                                | 5           |
| 9    | sigh                                | 8           |
| 10   | gym                                 | 62          |
| 11   | read_changelog                      | 0           |
| 12   | upload_symbols_to_crashlytics       | 3           |
| 💥   | pilot                               | 934         |
+------+-------------------------------------+-------------+

[00:10:49]: fastlane finished with errors

Looking for related GitHub issues on fastlane/fastlane…

Found no similar issues. To create a new issue, please visit: https://github.com/fastlane/fastlane/issues/new Run fastlane env to append the fastlane environment to your issue

[!] The request could not be completed because: [Swedish]: What to Test is required. What to Test is required. Validation errors

Environment

# Customise this file, documentation can be found here:
# https://github.com/fastlane/fastlane/tree/master/fastlane/docs
# All available actions: https://docs.fastlane.tools/actions
# can also be listed using the `fastlane actions` command

# Change the syntax highlighting to Ruby
# All lines starting with a # are ignored when running `fastlane`

# If you want to automatically update fastlane if a new version is available:
# update_fastlane

# This is the minimum version number required.
# Update this, if you use features of a newer version

fastlane_version "2.26.1"

custom_output_path = "./fastlane/build"

default_platform :ios

platform :ios do
  before_all do
    # ENV["SLACK_URL"] = "https://hooks.slack.com/services/..."
    cocoapods(use_bundle_exec: false)
  end

  desc "Submit a Build to Apple App Store"
  lane :prod do
    ensure_git_status_clean

    app_version = get_version_number_from_plist(xcodeproj: 'MyProject.xcodeproj', target: 'MyProject') # 1.2.1
    testflight_build_number = latest_testflight_build_number(
      app_identifier: $app_identifier_stage,
      version: app_version,
      initial_build_number: 0
      ) # 42
    UI.important "app_version #{app_version}"
    UI.important "testflight_build_number #{testflight_build_number}"

    if testflight_build_number == 0
      raise "You have to upload 'stage' build to TestFlight first"
    end
    release_version = "#{app_version}-#{testflight_build_number}" # 1.2.1-42
    UI.important "release_version #{release_version}"
    
    cert(output_path: custom_output_path)
    sigh(output_path: custom_output_path)

    gym(
      scheme: "MyProject",
      workspace: "MyProject.xcworkspace",
      configuration: $build_configuration,
      export_method: "app-store",
      clean: true,
      silent: true,
      suppress_xcode_output: true,
      include_bitcode: false,
      include_symbols: true,
      output_directory: custom_output_path
      )

    upload_symbols_to_crashlytics(api_token: "api_token")

    pilot(skip_waiting_for_build_processing: true)

    git_tag_name = "prod/#{release_version}"
    UI.important "git_tag_name #{git_tag_name}"
    if git_tag_exists(tag: git_tag_name)
      UI.error("Tag #{git_tag_name} already exists!")
    else
      add_git_tag(tag: git_tag_name)
    end

    push_to_git_remote
  end

  desc "Submit a new Beta Build to Apple TestFlight"
  lane :stage do
    ensure_git_status_clean

    app_version = get_version_number_from_plist(xcodeproj: 'MyProject.xcodeproj', target: 'MyProject') # 1.2.1
    build_number = latest_testflight_build_number(version: app_version, initial_build_number: 0) + 1 # 42
    release_version = "#{app_version}-#{build_number}" # 1.2.1-42
    UI.important "app_version #{app_version}"
    UI.important "build_number #{build_number}"
    UI.important "release_version #{release_version}"

    increment_build_number(build_number: build_number, xcodeproj: "MyProject.xcodeproj")

    cert(output_path: custom_output_path)
    sigh(output_path: custom_output_path)

    gym(
      scheme: "MyProject",
      workspace: "MyProject.xcworkspace",
      configuration: $build_configuration,
      export_method: "app-store",
      clean: true,
      silent: true,
      suppress_xcode_output: true,
      include_bitcode: false,
      include_symbols: true,
      output_directory: custom_output_path
      )

    release_notes = read_changelog
    UI.important "release_notes #{release_notes}"

    upload_symbols_to_crashlytics(api_token: "api_token")

    pilot(
      changelog: release_notes,
      beta_app_description: "MyProject app for iPad",
      beta_app_feedback_email: "email@domain.com",
      update_build_info_on_upload: true,
      distribute_external: true
      )

    stamp_changelog(section_identifier: release_version)
    git_add(path: "./CHANGELOG.md")

    commit_version_bump(message: "Version bump to "+release_version, force: true) # force - to commit CHANGELOG.md

    git_tag_name = "stage/#{release_version}"
    UI.important "git_tag_name #{git_tag_name}"
    if git_tag_exists(tag: git_tag_name)
      UI.error("Tag #{git_tag_name} already exists!")
    else
      add_git_tag(tag: git_tag_name)
    end

    push_to_git_remote
  end

  after_all do |lane|
    # This block is called, only if the executed lane was successful

    # slack(
    #   message: "Successfully deployed new App Update."
    # )
  end

  error do |lane, exception|
    # slack(
    #   message: exception.message,
    #   success: false
    # )
  end
end


# More information about multiple platforms in fastlane: https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Platforms.md
# All available actions: https://docs.fastlane.tools/actions

# fastlane reports which actions are used
# No personal data is recorded. Learn more at https://github.com/fastlane/enhancer

apple_id "apple_id" # Your Apple email address
team_id "team_id"  # Developer Portal Team ID

$app_identifier_stage = "me.MyProject-stage"
$app_identifier_release = "me.MyProject"

for_platform :ios do
  for_lane :stage do
  	$build_configuration = "Stage"
    $app_identifier_current = $app_identifier_stage
    app_identifier $app_identifier_current
  end

  for_lane :prod do
  	$build_configuration = "Release"
    $app_identifier_current = $app_identifier_release
    app_identifier $app_identifier_current
  end
end

# you can even provide different app identifiers, Apple IDs and team names per lane:
# More information: https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Appfile.md