The Xiaomi Home Assistant is a smart home device that allows users to control and automate various aspects of their home. However, some users have reported issues with the device, including the inability to play text. The error message 'action exec failed, invalid action params format' is often displayed. This issue can be caused by a variety of factors, including incorrect formatting of the text, issues with the device's software, or problems with the Home Assistant integration. To resolve this issue, users can try checking the formatting of the text, updating the device's software, or reinstalling the Home Assistant integration. Additionally, users can try checking the Home Assistant logs for any error messages that may indicate the cause of the issue. The Xiaomi Home Assistant is a powerful tool for smart home automation, and resolving this issue can help users to get the most out of their device. With the right troubleshooting and support, users can enjoy a seamless and convenient smart home experience.