Post conversion, I have a few users who cannot login because they've forgotten their password. I tell them to use the reset option but apparently no email comes through. So I just tried the option myself in the admin control panel and get the error: 2C114/13 This user is not currently using a login handler that uses a password.

Is it not possible to reset a users password post conversion until after they've logged in? Or I am missing something.

What did you convert from? What login handler(s) do you have enabled?

Converted from vBulletin 4. Enabled login handlers are Standard and Converter. 

Do you have any social logins enabled? For example, facebook/Twitter/Google/Apple/Microsoft/etc. We saw this issue with members who created a social account but then wanted a separate account password.

Nope. And my old vB forum didn't have facebook logins allowed either. The only clue is this on their account...

 

My best recommendation is to submit a ticket.