Not usign SSL on passbolt

Hello fellas i installed passbolt into a vps on my localhost envoiriment,
so i choose IP address in despite of a domain name, for this, i supose that ssl was not applied on my installation, so i use passbolt with a insecure warning on browser.

do you beleive that application remain insecure because of this missing ssl?
or it’s ok?

regarding that i am into a localhost and not over internet, this is a natural layer of security,
what do you think guys?

Almalinux 9
passbolt 3.8.2