Hi, I think I have the same problem.
I am pretty new to web dev and I am trying to create my own forum by using the FLARUM template. I am using localhost to have a try and now it can run smoothly. But when I log out the admin account and try to sign up a member, let's say the username is tony, after I click the 'sign up' button, it shows an error in that page. Later I find I can log in by using the tony account, but it shows that I need to verify the account. So now I cannot use it to post, response or upvote/downvote.
I think perhaps this is due to I did not set the administration email, but when I tried to add the email of admin account, it shows 'an error happened' so I cannot add that email.
Then I tried to sign up an account with my valid email, but still does not work.
So now I wonder whether this is due to some problems in installing the flarum? As I guess sign up a new user with the localhost should not be so tedious.
Or, is it possible that we can create new users without the verification for the forum? Thanks!