Core localization file download URL is wrong

Changing

'%core' => $project->core 

to

'%core' => 'all'

in /core/modules/locale/locale.translation.inc didn't solve my problem. Still getting errors like "Admin Toolbar (3.3.0). File not found at https://ftp.drupal.org/files/translations/all/admin_toolbar/admin_toolba..." errors for all module translations. I also got a lot of strings in a wrong other language.

I have currently only English as language and "Enable interface translation to English" is true.

I really need a solution for this annoying problem.

sorson - that looks like an unrelated issue. We don’t have any *.en.po files to serve from Drupal.org. Core localization should not be requesting English translations. 🐛 Drupal install throwing "Translation file not found" notice for "en" langcode when "translate_english" is set to false Needs work looks like the issue for that.