fastlane: deliver fails to save screenshots with "must be a .jpeg, .jpg, or .png (...)"

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

Using snapshot and deliver to upload screenshots fails with comments about wrong screenshot sizes. I’ve checked that the sized are correct.

[11:29:27]: Login to iTunes Connect (andreas@domain.com)
[11:29:29]: Login successful

+--------------------------------------+------------------------+
|                    deliver 1.14.0 Summary                     |
+--------------------------------------+------------------------+
| app_review_information.first_name    | Andreas                |
| app_review_information.last_name     | Skielboe               |
| app_review_information.phone_number  | +45 00000000           |
| app_review_information.email_address | andreas@domain.com     |
| app_identifier                       | com.domain.app         |
| username                             | andreas@domain.com     |
| screenshots_path                     | ./fastlane/screenshots |
| metadata_path                        | ./fastlane/metadata    |
| app_version                          | 1.2.3                  |
| ipa                                  | AppName.ipa            |
| skip_binary_upload                   | false                  |
| skip_screenshots                     | false                  |
| skip_metadata                        | false                  |
| force                                | false                  |
| submit_for_review                    | false                  |
| automatic_release                    | false                  |
+--------------------------------------+------------------------+

[11:29:29]: Making sure the latest version on iTunes Connect matches '1.2.3' from the ipa file...
[11:29:30]: '1.2.3' is the latest version on iTunes Connect
[11:29:30]: Loading './fastlane/metadata/en-US/description.txt'...
[11:29:30]: Loading './fastlane/metadata/en-US/keywords.txt'...
[11:29:30]: Loading './fastlane/metadata/en-US/release_notes.txt'...
[11:29:30]: Loading './fastlane/metadata/en-US/support_url.txt'...
[11:29:30]: Loading './fastlane/metadata/en-US/marketing_url.txt'...
[11:29:30]: Loading './fastlane/metadata/en-US/name.txt'...
[11:29:30]: Loading './fastlane/metadata/en-US/privacy_url.txt'...
[11:29:30]: Loading './fastlane/metadata/copyright.txt'...
[11:29:30]: Loading './fastlane/metadata/primary_category.txt'...
[11:29:30]: Loading './fastlane/metadata/secondary_category.txt'...
[11:29:30]: Loading './fastlane/metadata/primary_first_sub_category.txt'...
[11:29:30]: Loading './fastlane/metadata/primary_second_sub_category.txt'...
[11:29:30]: Loading './fastlane/metadata/secondary_first_sub_category.txt'...
[11:29:30]: Loading './fastlane/metadata/secondary_second_sub_category.txt'...
[11:29:30]: Verifying the upload via the HTML file can be disabled by either adding
[11:29:30]: `force true` to your Deliverfile or using `deliver --force`
Does the Preview on path './Preview.html' look okay for you? (y/n)
y
[11:29:37]: HTML file confirmed...
[11:29:38]: Activating language en-US...
[11:29:41]: Uploading metadata to iTunes Connect
[11:29:43]: Successfully uploaded initial set of metadata to iTunes Connect
[11:29:44]: Starting with the upload of screenshots...
[11:29:44]: Uploading 15 screenshots for language en-US
[11:29:44]: Uploading './fastlane/screenshots/en-US/iPhone7-0.png'...
[11:29:47]: Uploading './fastlane/screenshots/en-US/iPhone7-1.png'...
[11:29:50]: Uploading './fastlane/screenshots/en-US/iPhone7-2.png'...
[11:29:52]: Uploading './fastlane/screenshots/en-US/iPhone7-3.png'...
[11:29:54]: Uploading './fastlane/screenshots/en-US/iPhone7-4.png'...
[11:29:58]: Uploading './fastlane/screenshots/en-US/iPhone7Plus-0.png'...
[11:30:04]: Uploading './fastlane/screenshots/en-US/iPhone7Plus-1.png'...
[11:30:07]: Uploading './fastlane/screenshots/en-US/iPhone7Plus-2.png'...
[11:30:12]: Uploading './fastlane/screenshots/en-US/iPhone7Plus-3.png'...
[11:30:17]: Uploading './fastlane/screenshots/en-US/iPhone7Plus-4.png'...
[11:30:19]: Uploading './fastlane/screenshots/en-US/iPhoneSE-0.png'...
[11:30:22]: Uploading './fastlane/screenshots/en-US/iPhoneSE-1.png'...
[11:30:24]: Uploading './fastlane/screenshots/en-US/iPhoneSE-2.png'...
[11:30:26]: Uploading './fastlane/screenshots/en-US/iPhoneSE-3.png'...
[11:30:29]: Uploading './fastlane/screenshots/en-US/iPhoneSE-4.png'...
[11:30:31]: Saving changes

Looking for related GitHub issues on fastlane/fastlane...

[11:30:35]: Error finding relevant GitHub issues: undefined method `map' for nil:NilClass
Did you mean?  tap

[!] The request could not be completed because:
    In order to save your changes, all Screenshots for 4.7-Inchs must be a .jpeg, .jpg, or .png file that is 1334x750 or 750x1334 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 4.7-Inchs must be a .jpeg, .jpg, or .png file that is 1334x750 or 750x1334 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 4.7-Inchs must be a .jpeg, .jpg, or .png file that is 1334x750 or 750x1334 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 4.7-Inchs must be a .jpeg, .jpg, or .png file that is 1334x750 or 750x1334 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 4.7-Inchs must be a .jpeg, .jpg, or .png file that is 1334x750 or 750x1334 pixels, at least 72 DPI, and in the RGB color space. Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format. Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format. Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format. Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format. Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format. In order to save your changes, all Screenshots for 5.5-Inchs must be a .jpeg, .jpg, or .png file that is 2208x1242 or 1242x2208 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 5.5-Inchs must be a .jpeg, .jpg, or .png file that is 2208x1242 or 1242x2208 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 5.5-Inchs must be a .jpeg, .jpg, or .png file that is 2208x1242 or 1242x2208 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 5.5-Inchs must be a .jpeg, .jpg, or .png file that is 2208x1242 or 1242x2208 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 5.5-Inchs must be a .jpeg, .jpg, or .png file that is 2208x1242 or 1242x2208 pixels, at least 72 DPI, and in the RGB color space. In order to save your changes, all Screenshots for 4.7-Inchs must be a .jpeg, .jpg, or .png file that is 1334x750 or 750x1334 pixels, at least 72 DPI, and in the RGB color space. Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format. In order to save your changes, all Screenshots for 5.5-Inchs must be a .jpeg, .jpg, or .png file that is 2208x1242 or 1242x2208 pixels, at least 72 DPI, and in the RGB color space.

Configuration Files

Please copy the complete content of your Fastfile and any other configuration files you use below:

Snapfile:

# A list of devices you want to take the screenshots from
devices([
    "iPhone SE",
    "iPhone 7",
    "iPhone 7 Plus",
])

languages([
  "en-US",
])

# The name of the scheme which contains the UI Tests
scheme "UITests"

# Where should the resulting screenshots be stored?
output_directory "./fastlane/screenshots"

Environment

fastlane version: fastlane 1.105.0 snapshot version: snapshot 1.16.1 deliver version: deliver 1.14.0

Do you use bundler to execute fastlane (i.e. bundle exec fastlane)? no

Do you use a Ruby environment manager (e.g. chruby, rbenv, rvm)? rbenv

Xcode 8.0 macOS Sierra 10.12