Add family meber not possible - email adress not valid

[Flying4]

When I want to add a family member. I get an error in the validation of the email adress.

It shows 'Emailadress must be in notation:' 

No info about the notation is given. Also the emailadress is a valid email adress. 

( in this form : Name.FamilyName@provider.Country)

[Flying4 · Accepted solution]

I tried this at a desktop with Edge and chrome.

It didn't work.

I tried via the email link on my android phone and there I could add the email adresses without any problem ...

Strange ?