Looks like there is a new firmware version available, Version: 5.8.0 released: 06/11/2021. Just follow these steps;
https://www.klipsch.com/firmware?product=115490
Pre-requisites
You will need a USB thumb drive to complete the update.
Installation
Click the Download Firmware button.
Extract the contents of the ZIP file.
Make sure there are no existing files on the thumb drive. It must be blank to perform the update.
Copy the three extracted files to the root directory of the USB thumb drive.
Unplug power from The Fives.
Insert the USB thumb drive into the back of The Fives.
Reconnect AC power to The Fives.
After a few moments, the update cycle will start. You will see various LEDs lighting up. This takes about 2 minutes. Do not interrupt the process.
When the process is complete, the lights will stop flashing, and you should be able to change the volume.
Remove the USB thumb drive from The Fives.
The update is complete.