The answer to 'why is my dimmer switch outlet not working' is that there are a few common causes, including a faulty dimmer switch, incompatible light bulbs, or a problem with the electrical wiring. Dimmer switches can wear out over time, and using the wrong type of light bulb (like LED bulbs that aren't compatible with the dimmer) can also prevent the outlet from working properly.
If the dimmer switch itself is faulty, you may need to replace it. This is generally a DIY-friendly repair, but if you're not comfortable working with electrical components, it's best to call a licensed electrician. They can diagnose the issue and make any necessary repairs or replacements safely.