From Discord, posted by @jernej
We have released Sapphire 0.4.0 and Oasis Core 22.2.6 for MAINNET . This Sapphire release contains improvements to EVM compatibility. Any node operators running Sapphire on MAINNET please upgrade to Oasis Core 22.2.6 and update your node configuration to add the new version of Sapphire and restart your node in preparation of the upcoming MAINNET upgrade. See the updated MAINNET network parameters page for the link to the new releases: Mainnet | Oasis Network Documentation. Thanks!