That's not correct. In the UK there's the Crown Proceedings Act 1947, and in Canada the Crown Liability and Proceedings Act, and Australia this also seems to be the general case, but I didn't immediately find a statutory authority.

> https://www.alrc.gov.au/publication/traditional-rights-and-f...

There is no right to secede or otherwise unilaterally decide what the remedy for this claim is, but the idea that a tort was committed and the authorities were liable seems like the least crazy idea here.