Missing required icon file.

Hi there,

I am trying to submit the app to the Apple app store. While loading .ipa file to the Transporter and trying to Deliver or Verify I get the following messages:

Asset validation failed (90022)
Missing required icon file. The bundle does not contain an app icon for iPhone / iPod Touch
of exactly '120x120' pixels, in .png format for iOS versions >= 10.0.
To support older versions of iOS, the icon may be required in the bundle outside of an asset catalog.
Make sure the Info.plist file includes appropriate entries referencing the file.
See https://developer.apple.com/documentation/bundleresources/information_property_list/user_interface (ID: 75b46c3a-27af-4153-89eb-db29bb9d9daf)


Asset validation failed (90023)
Missing required icon file. The bundle does not contain an app icon for iPad
of exactly '167x167' pixels, in .png format for iOS versions supporting iPad Pro.
To support older operating systems, the icon may be required in the bundle outside of an asset catalog.
 Make sure the Info.plist file includes appropriate entries referencing the file.
See https://developer.apple.com/documentation/bundleresources/information_property_list/user_interface (ID: fcf92646-e78a-4dab-ac5d-dbf677c04805)


Asset validation failed (90023)
Missing required icon file. The bundle does not contain an app icon for iPad
of exactly '152x152' pixels, in .png format for iOS versions >= 10.0.
To support older operating systems, the icon may be required in the bundle outside of an asset catalog.
Make sure the Info.plist file includes appropriate entries referencing the file.
See https://developer.apple.com/documentation/bundleresources/information_property_list/user_interface (ID: 3f99e86e-999e-4e25-9830-1233601dad29)


Asset validation failed (90704)
Missing App Icon. An app icon measuring 1024 by 1024 pixels in PNG format must be included
in the Asset Catalog of apps built for iOS, iPadOS, or watchOS. Without this icon, apps cannot
be submitted for review. For details, see https://developer.apple.com/ios/human-interface-guidelines/icons-and-images/app-icon/. (ID: 73b7ab8c-a483-4102-9082-9eb9a601ad22)

I did try to create the missing icon files inside the Content folder of the .app file and then recreate the .ipa via iOS App Signer, however all my tries regarding supplying missing icons fail.

I also found the following page, that I would assume should help, but no success: https://developer.apple.com/library/archive/qa/qa1686/_index.html

So at the moment I am blocked of publishing because of this icon issue. Please help. Thanks!