Since you are paying nothing for YQArch, you won't get official phone support. However, here are fixes for 95% of issues:
Follow these steps to download and install the latest version (e.g., 6.7.4) on AutoCAD versions ranging from 2022 to 2026. Install YQARCH Plugin in AutoCAD
Access thousands of pre-drawn blocks for furniture, plants, vehicles, and architectural symbols.
: Visit the official website at yqarch.cn to download the latest version (currently 6.7.4). The site is initially in Chinese, but most browsers will offer to translate it to English for you.