https://bugs.winehq.org/show_bug.cgi?id=44961
--- Comment #1 from Rosanne DiMesio dimesio@earthlink.net --- What instructions did you follow? The command given on https://wiki.winehq.org/Ubuntu is
wget -nc https://dl.winehq.org/wine-builds/Release.key
I just tried it, and it worked fine.
FYI, there was a problem yesterday with the downloaded release keys (bug 44955), but that's been reported fixed.