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Operating System:
ALL
Steps To Reproduce:

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$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
Executing: /tmp/tmp.6wvy1lJQPK/gpg.1.sh --keyserver
hkp://keyserver.ubuntu.com:80
--recv
9DA31620334BD75D9DCB49F368818C72E52529D4
gpg: requesting key E52529D4 from hkp server keyserver.ubuntu.comgpgkeys: key 9DA31620334BD75D9DCB49F368818C72E52529D4 can't be retrieved
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
gpg: keyserver communications error: keyserver helper general error
gpg: keyserver communications error: unknown pubkey algorithm
gpg: keyserver receive failed: unknown pubkey algorithm

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$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4 Executing: /tmp/tmp.6wvy1lJQPK/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4 gpg: requesting key E52529D4 from hkp server keyserver.ubuntu.com gpgkeys: key 9DA31620334BD75D9DCB49F368818C72E52529D4 can't be retrieved gpg: no valid OpenPGP data found. gpg: Total number processed: 0 gpg: keyserver communications error: keyserver helper general error gpg: keyserver communications error: unknown pubkey algorithm gpg: keyserver receive failed: unknown pubkey algorithm

Hello, I got this errors when importing the public key used by the package management system.