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I have the Passbolt CE installed on a Debian 9, running on version 2.4.0. I’m trying to update it to version 2.7.1 (last) by following the https://help.passbolt.com/hosting/update tutorial, but running “git pull origin master” is returned "fatal: Not a git repository (or any of the parent directories): .git ".
Could you help me with the upgrade process?