First, check the user manual for your specific model to find the appropriate troubleshooting tips. If none work, contact the manufacturer to see if they can send out a repair person or a replacement. A warranty may even cover your water machine.
In general, though, here are some things you can try:
Leaks from the cooler: If the leak is coming from the cooler, it’s probably the bottle. There may be a crack in the plastic which then leaks. Remove the bottle and try a different one. If the leak stops, then you know it was the bottle.
Leaks from the drip tray: Empty the drip tray regularly to prevent it from overflowing. This alone is enough to cease drip tray leaks.
Leaks from the taps: It might be time to tighten the taps. Twist them slightly, and this should stop the leaking. If that doesn’t work, you may need to replace the spring or washer inside the taps. Remove the water bottle, drain the cooler tank, and contact an engineer to carry out this task.
If leaks persist, do not use the water cooler. Call the manufacturer and wait until the problem is fixed before resuming use.