Our sync nodes were deployed in AWS and there was a network failure happened in the morning caused data synchronization problems between nodes, blockchain explorer, wallet and exchange. Don’t be worry, everything is normal now. At the same time, each PoS node needs to do an upgrade today.
Every PoS Candidate Nodes should get the latest upgrade documents on UltronGlow's github account. (https://github.com/UltronGlow/UltronGlow-Origin)
Sorry for any inconvenience and thanks for supporting us!