SeleniumHQ/selenium · error · anyhow::Error

Unsupported architecture: {}

Error message

Unsupported architecture: {}

What it means

Thrown by get_normalized_arch() when the configured/detected architecture matches none of x32, x64, arm64, or armv7. It logs a warning first, then returns Err. The placeholder is the unrecognized arch string.

Source

Thrown at rust/src/lib.rs:1401

    fn get_arch(&self) -> &str {
        self.get_config().arch.as_str()
    }

    fn get_normalized_arch(&self) -> Result<&str, Error> {
        let arch = self.get_arch();
        if X32.is(arch) {
            Ok(ARCH_X86)
        } else if X64.is(arch) {
            Ok(ARCH_X64)
        } else if ARM64.is(arch) {
            Ok(ARCH_ARM64)
        } else if ARMV7.is(arch) {
            Ok(ARCH_ARM7L)
        } else {
            let err_msg = format!("Unsupported architecture: {}", arch);
            self.get_logger().warn(err_msg.clone());
            Err(anyhow!(err_msg))
        }
    }

    fn set_arch(&mut self, arch: String) {
        if !arch.is_empty() {
            self.get_config_mut().arch = arch;
        }
    }

    fn get_browser_version(&self) -> &str {
        self.get_config().browser_version.as_str()
    }

    fn get_major_browser_version(&self) -> String {
        if self.is_browser_version_stable() {
            STABLE.to_string()
        } else if self.is_browser_version_unstable() {
            self.get_browser_version().to_string()

View on GitHub (pinned to aa36b38e69)

Solutions

1. Pass a supported --arch explicitly (x86, x86_64, aarch64/arm64, armv7).
2. Confirm Selenium Manager is up to date; newer builds may add arch support.
3. If on a genuinely unsupported platform, run under emulation or use a supported runner.

Example fix

# before
selenium-manager --browser chrome --arch riscv64
# after
selenium-manager --browser chrome --arch arm64

fn supported_arch(a: &str) -> Option<&'static str> {
    match a.to_ascii_lowercase().as_str() {
        "x86" | "i386" | "i686" => Some("x86"),
        "x86_64" | "x64" | "amd64" => Some("x86_64"),
        "aarch64" | "arm64" => Some("aarch64"),
        "armv7" | "armv7l" => Some("armv7"),
        _ => None,
    }
}
if supported_arch(detected).is_none() { return Err(anyhow!("unsupported arch")); }

When it happens

Trigger: get_arch() returns a value that matches none of X32/X64/ARM64/ARMV7 matchers (lib.rs:1388-1402), e.g. an exotic or malformed architecture string.

Common situations: Running on an unsupported CPU (e.g. RISC-V, s390x); --arch passed a wrong value; arch detection returned garbage.

Related errors

• Unsupported platform/architecture combination: {sys.platform
• Linux arm64 is not supported yet by Google Chrome. Please tr
• Linux arm64 is not supported yet by {}. Please try another b
• Invalid operating system: {os}
• Linux arm64 is not supported yet by Microsoft Edge. Please t

AI-assisted analysis of SeleniumHQ/selenium@aa36b38e69 (2026-08-14). Data as JSON: /api/errors/0eac5367ac287184. Report an issue: GitHub.