Alright, thanks for sharing the output.
I’ve reprocued your issues, installing Passbolt CE via package installation, and after steps 2.7 I closed the browser, so I had also an empty set in email_queue table.
What I’ve done is, I have nagivated to the fullBaseUrl (e.g. https://passbolt.local), then I’ll see this prompt asking me to enter the email, I have written the administrator email that I’ve just created through the WebInstaller:
Then, you should have a message “We sent you a link to verify your email. Check your spam folder if you do not hear from us after a while.”
Now, please comeback to the database and use:
SELECT email, subject, template_vars FROM email_queue ORDER BY id ASC LIMIT 3;
You should not see an empty set but being able to see one of the subject being “Welcome to passbolt, ${admin} !” following my previous message, I have highlighted what we want to retrieve here:
So, inside the token array, we need the user_id and the token id, once you’ve got them you can create a setup link:
https://<YOUR_URL>/setup/install/<USER_ID>/<TOKEN_ID>, for me it will looks like:
Navigate to the setup url, and you’ll be able to see this page or the page asking you to install the browser extension:
Finish the account setup process, and you should be able to enjoy Passbolt 
I really hope it helps.