The geckodriver, when running as a Selenium Grid node fails to find any tags. When run with Selenium Standalone or the driver on its own it works fine.
✖ Timed out while waiting for element <body> to be present for 30000 milliseconds. - expected "visible" but got: "not found" (30014ms)
at Object.<anonymous> (.../nightwatch/BaseCommand.js:69:24)
at process._tickCallback (internal/process/next_tick.js:68:7)
Selenium Standalone - geckodriver