Commented Unassigned: Password not valid [11]

Good morning,
I'm using this module in a DNN 7.3.4 version.
I tried to import some user and I flagged the "send email option" and "geenrate random password"; the system sends password that aren't working in some users.

I tried to import 6 users and i received 2 valid passwords and 4 not valid passwords.

Thanks in advance for support,
best regards
Comments: Thank you for your answer. The problem isn't the password, but the password sent via mail that doesn't match and user can't login. It's ok to have a webex meeting; can you please set up a webex meeting for monday ? We use CET time, and we are available from 9 to 13 CET and from 14.30 to 19 CET. Thanks in advance for support, best regards