Install of Add-ons

HI

I have a new install on ubuntu 18.


I installed
MQTT
Configurator
Samba

When I try install other add-ons I get

18-10-31 10:17:15 INFO (SyncWorker_6) [hassio.docker.interface] Pull image homeassistant/amd64-addon-ssh tag 4.
18-10-31 10:17:26 ERROR (SyncWorker_6) [hassio.docker.interface] Can’t install homeassistant/amd64-addon-ssh:4 -> 404 Client Error: Not Found (“no such image: homeassistant/amd64-addon-ssh:4: No such image: homeassistant/amd64-addon-ssh:4”).

Can Anybody help