All my wallets stopped syncing and are showing
2020-01-20T19:00:34Z ERROR: AcceptBlock: rejected by synchronized checkpoint
2020-01-20T19:00:34Z ERROR: ProcessNewBlock: AcceptBlock FAILED ( (code 0))
Please update your client to 0.18.2 or pull the latest source from GitHub and compile. Some clients got stuck yesterday and an updated client has now been released and source updated to resolve the problem.