The first thing I would check is whether a user card (or an account request card, depending on how you have things set up) got (gets) created. If so, then the request made it to the server. If that's confirmed and the email didn't make it through, I would send the address to cloudstore and ask if you can confirm that it went out.
If the account got created, then yes, you can set a password for a user. that's probably the quickest fix. I would then encourage the user to enter their own pw.
It's worth noting that the handling of signups and signins is being significantly upgraded in 1.13.0, which should be out within a couple of weeks.
Well, I'm not using cloudstore anymore...
How is it supposed to send email in general? I mean, don't you need to have a mail server installed? (Which, if you need to have a mail server installed should be part of the installation instructions because it's a necessary part of the platform.)
It's set up to make account request cards.
When I try to make one via the Sign Up link it just says Wagn Hitch. I was able to create one as an admin by inviting someone.