What to do if the coffee drips from the edge of the portafilter of the Xiaomi Semi-automatic Espresso Machine?

If the coffee drips from the edge of the portafilter of the Xiaomi Semi-automatic Espresso Machine, please refer to the following details:
1. The portafilter is not installed correctly. Install the portafilter correctly and fix it into the right position;
2. The portafilter is not tightened completely due to excessive coffee powder inside. Remove the portafilter slowly, and clean the portafilter holder with a clean towel. Reduce the amount of coffee powder when you make coffee again;
3. The coffee powder bowl is clogged. Rinse the powder bowl with tap water, and use a brush to clean the holes of the powder bowl.