ModuleNotFoundError: No module named 'email_validator'

[joe]

The setup fail when validate email address...

My system:
ubuntu Ubuntu 22.04 x64
python3 (3.10.6-1~22.04).

Error:

│ That's not a valid email address. │ <<
Traceback (most recent call last):
File "/root/mailinabox/management/mailconfig.py", line 14, in
from email_validator import validate_email as validate_email_, EmailNotValidError
ModuleNotFoundError: No module named 'email_validator'

Thank you for ur help, i have try a lot of things from internet, don't know why i have this error...