After the release of Athena V21.0 of the Nano node a couple of issues were discovered which require resolution on the network to ensure node operation, communication and bootstrapping continue to function as expected.
We are making Nano node V21.1 available for the main network today as a required update for all nodes. This update does not include any major breaking functionality, database upgrades, or other changes that require special consideration.
This thread is available for seeking support with upgrading or other questions related to the release. Thank you for your continued support and participation on the Nano network!