Can't access /var/www/nextcloud permission denied?

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on a fresh install of nextcloudpi rasspberrypi 1.52.4
when ssh to the ncp I cannot enter the /var/www/nextcloud
and trying to sudo su - I have no permission
how can I have the permissions to explore all the folders?
thank you

I use one of the folliwing:

sudo {ls,find} /var/www/nextcloud
sudo bash