Error: AccountUnmapped when using Ink! 6.0.0-beta.1

[Lohann]

The ui.use.ink reports this error when using latest cargo-contracts v6.0.0-beta.1 and the latest ink-node v0.47.0

Steps to reproduce

rust: rustc 1.91.1 (ed61e7d7e 2025-11-07)
ink-node: ink-node 0.47.0-6ade73c778d
cargo-contract: v6.0.0-beta.1

cargo install --git https://github.com/use-ink/cargo-contract.git --tag v6.0.0-beta.1
cargo contract new test
cd test
cargo contract build --release

ink-node --dev

Then enter in the https://ui.use.ink/ and try to deploy the fiipper contract.