Rated 2 out of 5 stars

Hello.
95.3 does not fix the problem.
I can connect to my server with 94.4 but, with 95.3, it says "Validation error" and aborts the connection.

This review is for a previous version of the add-on (95.3). 

after the available 95.5, a new version is instance of approbation which fix most the known bugs (95.6 here :https://addons.thunderbird.net/fr/developers/addon/cardbook/versions/2491083)

if you have remaining issues, please open a ticket here : https://gitlab.com/CardBook/CardBook/-/issues