A. 1. Ensure that your internet connection is stable, as a weak connection can cause timeouts. 2. Try reducing the complexity of the DIY project by using fewer elements or simpler designs. 3. Restart the app and try the DIY function again.

B. 1. Clear the app cache by going to Settings > General > iPhone Storage, selecting the Shining Mask app, and choosing 'Offload App'. Then reinstall it. 2. If the timeout continues, consider using a different device to create your DIY images.