tinyhumansai/openhuman · error

Rust-native browser backend is enabled but WebDriver endpoin

Error message

Rust-native browser backend is enabled but WebDriver endpoint is unreachable. Set browser.native_webdriver_url and start a compatible driver

What it means

The rust-native backend is compiled in and selected, but its WebDriver endpoint (browser.native_webdriver_url) is unreachable during availability probing. The backend needs an external WebDriver-compatible driver process, and none answered.

Source

Thrown at src/openhuman/tools/impl/browser/browser.rs:227

                }
            }
            BrowserBackendKind::Playwright => {
                if Self::is_playwright_available().await {
                    Ok(ResolvedBackend::Playwright)
                } else {
                    anyhow::bail!(
                        "browser.backend='playwright' but Playwright is unavailable. Ensure app/node_modules is installed, run `pnpm --filter openhuman-app exec playwright install chromium-headless-shell`, or set OPENHUMAN_PLAYWRIGHT_CWD."
                    )
                }
            }
            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_playwright_available().await {

View on GitHub (pinned to 7491200858)

Solutions

  1. Start a compatible WebDriver driver (e.g. chromedriver/geckodriver).
  2. Set browser.native_webdriver_url in config.toml to the driver's address.
  3. Verify the driver port is not blocked by firewall.
Defensive patterns

Strategy: fallback

When it happens

Trigger: Thrown at src/openhuman/tools/impl/browser/browser.rs:227 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tinyhumansai/openhuman@7491200858 (2026-08-17). Data as JSON: /api/errors/920a67d5f3ee530a. Report an issue: GitHub.