2 people reported
All time, since Oct 16.
Browser control MXC sandbox failure
“On October 16, 2026, a fresh delegated task on a Windows laptop could not initialize the supported browser controller after the morning app update.”
Is this your bug? What gets counted gets fixed. Pile on.
Paste this into your agent. It files your report, with your error and version.
I hit this bug: rapsheet.dev/sheets/codex/issues/18388/file Follow it to file my report. Show me the text before you send.
No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends
Browser control fails to initialize MXC sandbox on Windows. Delegated tasks on a Windows laptop fail before any tab opens, and the error persists after a full restart.
Is this your bug?
File my report- Where
- browser controller
- Error text
Error: failed to prepare MXC sandbox: MXC requires nonempty Unicode host SystemDrivePasted in 2 reports- Versions
- 0.0.30
- Platforms
- Windows
- How bad
- Stops work: a core feature can't be used.
Related: Browser/Computer Use runtime won't start
Not quite your bug?
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