My Lulzbot Workhorse locks up when OctoPrint connects to it

We've seen some reports here on the forums that this particular printer either ships with a broken SD card or has a firmware but that causes the SD file list command that OctoPrint does on connect to never complete, effectively locking up the printer.

If you experience an issue like this, power off your printer, eject the SD card from your printer, power it back on and try connecting again.