Hi @Majortom. Have you tried removing the Chime from your account, resetting it and then re-adding it back to the system? To do a reset, you will press and hold down the button on the side for 30 seconds while plugged in. If you have a pinhole on the side, just press and hold down something in that pinhole, while the Chime is plugged in, for the same time.
Once you’ve done this, try to save your Chime sound and see if it saves. If it’s still not allowing you to update it, please reach out to our support team at 1-800-656-1918 to let them know of this!