Unable to import .abbu file into Contacts on Mac OS Big Sur 11.6.1
After re-installing the OS, I am trying to import my contact from a backup .abbu file.
The .abbu file seems to be ok. It is more than 20 Mb and it contains my contacts.
But when I import the .abbu in Contacts, nothing happens: my contacts remain empty.
I tried to follow the suggestion in this thread, but it doesn't work:
https://discussions.apple.com/thread/251093268?answerId=252096175022#252096175022
Any idea?
Thanks.
MacBook Pro 16″, macOS 11.6