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openclaw - 💡(How to fix) Fix [Bug]: Browser automation not usable in local Windows install due to Chrome sandbox failure [1 comments, 2 participants]

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openclaw/openclaw#74376•Fetched 2026-04-30 06:24:43
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Managed browser launch fails with Chrome namespace/sandbox error, preventing browser automation from functioning.

Error Message

Managed browser launch fails with Chrome namespace/sandbox error, preventing browser automation from functioning. Result: browser fails to start with namespace/sandbox error. Result: browser fails to start with namespace/sandbox error. Browser fails to start with error: Observed error output: Existing-session attach to Chrome also failed earlier with DevToolsActivePort error.

Root Cause

Managed browser launch fails with Chrome namespace/sandbox error, preventing browser automation from functioning.

Code Example

Observed error output:

"Failed to start Chrome CDP on port..."
"Failed to move to new namespace... Operation not permitted"

Reproduced consistently after installing Chrome and applying noSandbox configuration.
RAW_BUFFERClick to expand / collapse

Bug type

Behavior bug (incorrect output/state without crash)

Beta release blocker

No

Summary

Managed browser launch fails with Chrome namespace/sandbox error, preventing browser automation from functioning.

Steps to reproduce

  1. Install OpenClaw via npm on Windows.
  2. Run openclaw onboard and complete setup with OpenAI.
  3. Install Google Chrome.
  4. Configure browser with executablePath and noSandbox settings.
  5. Run openclaw browser --browser-profile openclaw start.

Result: browser fails to start with namespace/sandbox error.

Expected behavior

  1. Install OpenClaw via npm on Windows.
  2. Run openclaw onboard and complete setup with OpenAI.
  3. Install Google Chrome.
  4. Configure browser with executablePath and noSandbox settings.
  5. Run openclaw browser --browser-profile openclaw start.

Result: browser fails to start with namespace/sandbox error.

Actual behavior

Browser fails to start with error:

"Failed to move to new namespace... Operation not permitted" "Failed to start Chrome CDP..."

No browser session is created.

OpenClaw version

2026.4.26

Operating system

Windows 11 (local install) and Ubuntu container environment (previous attempt)

Install method

npm global

Model

OpenAI GPT-5.5

Provider / routing chain

openclaw -> openai

Additional provider/model setup details

Standard OpenAI API key configured during onboarding. No custom routing or overrides.

Logs, screenshots, and evidence

Observed error output:

"Failed to start Chrome CDP on port..."
"Failed to move to new namespace... Operation not permitted"

Reproduced consistently after installing Chrome and applying noSandbox configuration.

Impact and severity

Affected: Local users attempting browser automation Severity: High (blocks browser automation entirely) Frequency: Always (100% reproduction) Consequence: Unable to automate browser tasks such as logging into WordPress or creating pages

Additional information

Existing-session attach to Chrome also failed earlier with DevToolsActivePort error.

Managed browser required manual installation of Chrome and configuration changes not covered in onboarding.

No working browser automation path achieved after full setup.

extent analysis

TL;DR

The most likely fix is to adjust the Chrome configuration, specifically the noSandbox setting, to resolve the namespace/sandbox error preventing browser automation.

Guidance

  • Verify that the noSandbox setting is correctly applied in the browser configuration, as this setting is known to cause issues with Chrome's sandboxing feature.
  • Check the Chrome version and ensure it is compatible with the noSandbox setting, as some versions may have different requirements or behaviors.
  • Consider alternative configuration options, such as using a different Chrome flag or setting, to achieve the desired browser automation functionality.
  • Review the OpenClaw documentation and OpenAI API configuration to ensure that the setup is correct and compatible with the browser automation requirements.

Example

No code snippet is provided as the issue is related to configuration and setup rather than code.

Notes

The issue may be specific to the Windows 11 environment, and further testing on other operating systems may be necessary to determine the root cause. Additionally, the noSandbox setting may have security implications, and its use should be carefully evaluated.

Recommendation

Apply workaround: Adjust the Chrome configuration to resolve the namespace/sandbox error, as the noSandbox setting is likely the cause of the issue. This workaround is recommended as it directly addresses the reported error and may provide a temporary solution until a more permanent fix is available.

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FAQ

Expected behavior

  1. Install OpenClaw via npm on Windows.
  2. Run openclaw onboard and complete setup with OpenAI.
  3. Install Google Chrome.
  4. Configure browser with executablePath and noSandbox settings.
  5. Run openclaw browser --browser-profile openclaw start.

Result: browser fails to start with namespace/sandbox error.

#api#installation#tokenizer error#prompt formatting#chain error

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