The error means I2S port 0 driver wasn’t installed before uninstall was called. Make sure you call i2s_driver_install() successfully before attempting i2s_driver_uninstall(). Also, check that your code isn’t trying to uninstall the driver twice or uninstall before install. Reviewing the initialization sequence and adding error checks after install calls should help fix this issue. If you’re using legacy I2S, consider updating to the latest driver APIs for better stability.