I have exactly the same error, and have plenty of space (1 TB+ available hard disk, 64GB RAM). This error has nothing to do with physical disk space or memory. But what exactly does it mean? Someone, somewhere, in Apple Land created this error message and knows what it means. Can we get that person? The error is intermittent, and makes Safari virtually unusable. The page always opens in Chrome.
Solutions that suggest we just "empty library cache, clear history, restart Safari or reboot" are less than helpful. Maybe we don't want to restart Safari and lose all of our tabs, even though the error seems to have nothing to do with number of tabs open. And expecting someone to stop everything and reboot their machine is a non-starter.
