Hi @TheFunk35
Thanks for your feedback about how you resolved your issue, and yes, I chose this avatar because I like the hacker spirit 
Good tatoo choice 
About the php-fpm symlink, how did you create it ? If created by hand, it will disappear on next reboot as files in /var/run folder are not persistent.
Regarding your nginx issue, your server has an IPv6 ? If yes, there is an known-issue with passbolt nginx configuration files and the default nginx virtualhost => Not able to install Passbolt CE on Ubuntu 20.04 with Let's Encrypt - #5 by _jc
Maybe it is related 
?