MyBB Community Forums

which MyBB version do you run?

check templates for updated templates

1.8.37

There were no updates in "Find Updated Templates"

Check that member.php is not modified. AdminCP / Tools and Maintenance / File Verification
Check error.log for errors that occur during attempt to register new member.
Check that AdminCP / Configuration / Login and Registration Options / Registration Method is not Send Random Password.
Verify that template member_register_password is default, not modified.

$passboxes is defined in one place for member registration, and is skipped if settings['regtype']="randompass"

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Thinking further on this, if regtype setting is randompass, then add one line to core code in member.php at line 1168

$passboxes = "";

This is a vital reference tool for MyBB if you want to learn what is taking place.
https://crossreference.mybb.de/_variables/

I have changed Registration Method to Send Email Verification and the error no longer appears on the initial registration screen.  Unfortunately I have migrated my domain yesterday and cannot yet send emails from my website to test this new setting, but as soon as this is back up and running, I will give it a test.

Thanks again for your assistance