Etcher fails to install Tails 4 IMG file (corrupted image?)

multiple users (at least two are using macOS) reported that after downloading the IMG file without errors, Etcher failed to install it on the USB stick with this error message :

Something went wrong. If it is a compressed image, please check that the archive is not corrupted.

the first reports were received 10/2/19 around 4 AM

@sajolida

Related issues

Blocks #16688

Original created by @goupille on 17185 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information