I don't know if anyone here can help explain what happened. I was adding a new member (in my Q&A site) and instead of registering I used the Add New option under Users. I received an email to verify and I clicked on the link, the login page opened and I entered my username/password.
When it didn't work, I went back to my admin page to check if the user was verified or not and maybe change the password and try again, I click the back button on my browser and all I got was error.
I tried the public URL and other admin options and all I get is a blank page with one simple word 'error'. I tried another computer and faced the same.
I don't know what went wrong.
edit to add: it took a while but site is back now still don't know what happened, I didn't do anything other than freak