I am 2 years into Obsidian, and 2 months into Obsidian Sync. I am running Obsidian with Obsidian Sync on two Mac laptops .
Mid-day, for no apparent reason, I started getting "Database is locked [file path and file name] error on both laptops; my note files will not sync. I have restarted Obsidian, rebooted the laptops, I have perfect internet connection.