Give the router a factory reset and that should remove the error - it's always recommended to do so after an update anyway to remove any issues that may carry over.
factory rest completed in the process it reverted to a older firmware and updated to current v.134. after updated and set up wizard. I unpluged the router and power cycled the router.
I updated the router to v2.3.2.134 about a month before I noticed the error.
I contact support, was recommended to factory reset, I did the factory reset. Once completed I was sent to the wizard for internet and WiFi set up After completing the wizard set up. The router automatically Search for an update. V2.3.2.134 was available, so I accepted the update. Once completed I clicked QOS tab same error poped up. I then turned off the router and unplugged it for 30 seconds to power cycle and refresh the machine. Reconnect. Went to QOS tab clicked and got the same error.
I believe what you'll need to do in this case is to downgrade to the latest previous firmware, factory reset when on that firmware, then re-upgrade to the latest. You don't need to factory reset again after that. That should solve the problem for you.
recovery mode. 1.Turn off the power, push and hold the reset button (in a hole on backside) with a pin 2.Turn on the power and wait till power led starts flashing white (after it first flashes orange for a while) 3.Release the reset button and tftp the factory img in binary mode. The power led will stop flashing if you succeeded in transferring the image, and the router reboots rather quickly with the new firmware.
Uploading the firmware image with a TFTP client use the command :
tftp -i 192.168.1.1 put XR500-V2.3.2.134.img
and finally, I get the confirmation " Transfer successful: 38529153 bytes in 4 second(s), 9632288 bytes/s"
