Time Machine can't access the backup disk "Data".

The operation couldn't be completed. ( OSStatus error 22. )
anyone else having this problem when trying to back-up on TC ?

Strange.. two in a row looks bad.
I want you to ensure you have ipv6 set to link-local for both wireless and ethernet on the computer.
Power down the TC and leave it for an hour or two.
Then power it up again.. does it still have the same issue.
Do a full factory reset.
Universal Factory Reset.. any model TC or AE.
Unplug your TC/AE from power or turn off at the power point.
Hold in reset. and power the TC/AE back on..  all without releasing reset and keep holding in for about 10sec. (this is often difficult without a 2nd person or a 3rd arm).
Release it when the status light flashes rapidly. If it doesn’t flash rapidly you have missed it and try again.
Note..
Be Gentle! Feel the switch click on. It has a positive feel..  add no more pressure after that.
TC/AE will reboot after a couple of minutes with default factory settings and will wipe out previous configurations of the router.
No files are deleted on the hard disk in a TC.. No reset of the TC deletes files.. to do that you use erase from the airport utility.
Power down and see if it will come up again after an hour with the same problem.
Go to the Disk tab of the airport utility .. is the erase button working.. please try and do a quick erase first.. does that work? If not try a one pass erase?
If everything fails.. ring apple support .. or do that anyway and let them talk you through the problem.
The fact that it worked for 3days and failed and the first was dead out of the box might mean you have some other issue.. but I cannot figure out what it could be. Hard drive failure early on is not unusual.. two in a row is.

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