'deny-connection' constraint (interface attributes) in automatic review

I got this error when publishing my cryptochecker app snap package

human review required due to ‘deny-connection’ constraint (interface attributes) declaration-snap-v2_slots_connection (dbus-cryptochecker, dbus)

I’ve followed the instructions on https://flutter.dev/docs/deployment/linux to publish a flutter app on snap.
This is my github project that is linked with snap https://github.com/andreclerigo/cryptochecker