error installing ros "gpg: keyserver receive failed: Server indicated a failure"
hello everyone im trying to install ros following the instructions in this link http://wiki.ros.org/melodic/Installat... when i try step 1.3 i get the following error "gpg: keyserver receive failed: Server indicated a failure" i tried the proposed solutions in the link be replacing the server with another one, but all servers show the same error. any help ? im using ubuntu 18.04