During a test of this app, the install failed because :
W: GPG error: http://cdn-fastly.deb.debian.org/debian stretch-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010
was able to solve the issue by manually adding the key with :
During a test of this app, the install failed because :
was able to solve the issue by manually adding the key with :
(though the first one took 3 trials before succeeding on my machine ...?)