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You should upgrade or use an alternative browser. Just did a fresh re-install of Sequoia on a Macbook Air M1. I can connect to the Time Capsule on the same wifi in my house.
I have deleted the disk partition and started clean so I have a completely empty Time Capsule 2TB free.
The backup starts and goes on for 24h - laptop is plugged in and connected. After almost 24h, the backup cannot complete. I have now tried this 3x.
I did a search and previous suggestions was to wipe the disk partition, which I did. Looking for other suggestions please as it's odd I cannot get the backup to complete on a fresh Sequoia build.
Thanks