Please download the latest version v3.1.3 of Energi Gen 3 Core Node available per target operating systems.
If your node was running a version prior to v3.0.8 please apply the preimages as described here
You can verify your download by confirming the SHA256 signature matches the one given in SHA256SUMS. For example:
sha256sum -c --ignore-missing SHA256SUMS
SHA256SUMS is GPG signed by:
Ryan Lucchese <firstname.lastname@example.org>
GPG Public Key: C43E788A1BD03C280CAC7D9FF5047BCFDB1DA83F
These tools make sense only for smart contract developers.