Someone using Safari in their Mac might have some problems when trying to upload the app signing key to Google since it requires a zip file, but the android-build-key.zip file was downloaded as a folder on their system.
This is likely due to a client-side configuration and there are a few options on how to resolve this.
- Compress the files inside the android-build-key folder into a .zip file so it can be uploaded to Google. One can follow the Standard Instructions for Mac or use a third-party tool such as RAR Extractor.
- Follow the instructions on the Apple Community Thread to update the settings in Safari so that .zip files are not automatically decompressed after being downloaded.
- Use a different browser to download the android-build-key.zip file.
Once the zip file is ready, one would be able to upload it to Google without any issues.