Diagnosis
That's the OE or OE1 error, and yeah, this one's common. It means your machine thinks it's taking too long to drain the water, usually because the drain hose or pump filter is clogged.
How to Fix It
Unplug the machine first. The pump filter is behind a small access panel at the bottom front-right corner. Have a shallow pan and towels ready because some water will come out. Unscrew the filter cap slowly, let the water drain, and pull out any debris (coins, hair, etc.). Also, check the drain hose behind the machine isn't kinked or pushed too far down the standpipe.
If That Didn't Work
The drain pump itself might be jammed or failed. You'd need to check the pump impeller through the filter housing for an obstruction it can't clear, or listen for a humming sound when it tries to drain, which points to a bad pump.
Heads Up
Don't just clear the error and restart. If the drain path is still blocked, you'll flood the machine. Always clear the physical blockage first.