sudo: error initializing audit plugin sudoers_audit

[Richardszu]

I would like to Restore my Nextcloud from remote storage:
We launch the cmd:
sudo -u www-data php occ
I have the error message:
sudo:unknown user:www-data
sudo: error initializing audit plugin sudoers_audit
I searched how to solve this error and I couldn't find anything conclusive!
Initially I want to run this cmd:
./occ backup:point:list
I backed up nextcloud and would like to test restoring my backup with this cmd:
./occ backup:point:download 20211031232710-full-Tu4H6vOtxKoLLb9 --external 3
If anyone has an idea how to do it because I'm new to OCC :)
Have a great day