zeroclaw-labs/zeroclaw · error · anyhow::Error

browser.backend='computer_use' but sidecar endpoint is unrea

Error message

browser.backend='computer_use' but sidecar endpoint is unreachable. Check browser.computer_use.endpoint and sidecar status

What it means

Error "browser.backend='computer_use' but sidecar endpoint is unreachable. Check browser.computer_use.endpoint and sidecar status" thrown in zeroclaw-labs/zeroclaw.

Source

Thrown at crates/zeroclaw-tools/src/browser.rs:393

                    )
                }
            }
            BrowserBackendKind::RustNative => {
                if !Self::rust_native_compiled() {
                    anyhow::bail!(
                        "browser.backend='rust_native' requires build feature 'browser-native'"
                    );
                }
                if !self.rust_native_available() {
                    anyhow::bail!(
                        "Rust-native browser backend is enabled but WebDriver endpoint is unreachable. Set browser.native_webdriver_url and start a compatible driver"
                    );
                }
                Ok(ResolvedBackend::RustNative)
            }
            BrowserBackendKind::ComputerUse => {
                if !self.computer_use_available()? {
                    anyhow::bail!(
                        "browser.backend='computer_use' but sidecar endpoint is unreachable. Check browser.computer_use.endpoint and sidecar status"
                    );
                }
                Ok(ResolvedBackend::ComputerUse)
            }
            BrowserBackendKind::Auto => {
                if Self::rust_native_compiled() && self.rust_native_available() {
                    return Ok(ResolvedBackend::RustNative);
                }
                if Self::is_agent_browser_available().await {
                    return Ok(ResolvedBackend::AgentBrowser);
                }

                let computer_use_err = match self.computer_use_available() {
                    Ok(true) => return Ok(ResolvedBackend::ComputerUse),
                    Ok(false) => None,
                    Err(err) => Some(err.to_string()),
                };

View on GitHub (pinned to 88bb9c8533)

Solutions

1. Check browser.computer_use.endpoint and that the sidecar is running, or change browser.backend.

When it happens

Trigger: Thrown at crates/zeroclaw-tools/src/browser.rs:393 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zeroclaw-labs/zeroclaw@88bb9c8533 (2026-08-23). Data as JSON: /api/errors/4629ec20c55df405. Report an issue: GitHub.