XF 1.4 Can't create new user

I don't seem able to create a new user on our XF installation, and another admin is having the same problem. I click in 'Create new user' and fill everything in and click Save....it seems to save it but then the new member is not on the members list.
Same thing when I go through the registration process, I get the email confirmation but then get an error when I click on the link.
 
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