Email Forwarding of addon domain not working, showing error 'NoneType' object has no attribute 'doma

I am using the free version of cyberpanel.
I have a website AB.com and then I have added another website under that website from addon with the name of DEF.com, when I am trying to put email forwarder to another email in def.com I get this error ‘NoneType’ object has no attribute ‘domain’

Can anyone help, please?

Regards

@admin anyone?
I have even tried updating my cyberpanel to 2.0.0 , still error. can admin please look into it

I am experiencing the same issue with 2.0.0 on Centos 7