[R] Ubuntu hirsute unable to receive the key to add the repository

[Victor]

I followed the procedure indicated in https://cran.mirror.garr.it/CRAN/ 
step by step to� install R under ubuntu 21.04 hirsute but� the apt-key 
command failed:

vr using ubuntu:~$ apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 
E298A3A825C0D65DFD57CBB651716619E084DAB9
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d 
instead (see apt-key(8)).
Executing: /tmp/apt-key-gpghome.gHJAZ9lYF3/gpg.1.sh --keyserver 
keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
gpg: ricezione dal server di chiavi non riuscita: Server indicated a failure

Please help to solve this problem.

Ciao

Vittorio


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