As previously announced, the format of GitHub authentication tokens has changed. The following token types have been affected:

Due to the updated format of GitHub authentication tokens, GitHub Connect will no longer support instances running GitHub Enterprise Server (GHES) 3.1 or older after June 3, 2022. To continue using GitHub Connect, an upgrade to GHES 3.2 or newer will be required by June 3. GitHub Connect is necessary in order to use the latest features, such as Dependabot updates, license sync, Actions synchronization, and unified contributions.

GHES customers seeking a GHES upgrade can follow the instructions outlined in the instructions for Upgrading GitHub Enterprise Server.