install.sh gives Invalid signature error

[Arjan via Digitalmars-d]

Trying to execute the install.sh on a centos7.5 system gives an 
error:
Invalid signature 
http://downloads.dlang.org/releases/2.x/2.080.1/dmd.2.080.1.linux.tar.xz.sig

For each version I tried.
Whats wrong?