My computer is dead and the browser says that my sync phrase comes from an outdated version of the browser and that it needs to be updated, except I can’t because my computer is dead.
Do you have the first 24 words?
If so, the add the 25 th word from here https://alexeybarabash.github.io/25th-brave-sync-word/.
Type the first 24 words then the new 25 th word.
Make sure you have correct regional timezone of your country on your device.