Vibe mistral error on new thread (update or fresh acp install)

[slebon]

Reproduction steps

1. Start zed
2. Install (or update) acp mistral vibe
3. launch a new thread

Current vs. Expected behavior

I have this error with the last zed version:

Server exited with status exit status: 255
[PYI-6257:ERROR] Failed to load Python shared library '/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python': dlopen(/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python, 0x000A): tried: '/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python' (slice is not valid mach-o file), '/System/Volumes/Preboot/Cryptexes/OS/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python' (no such file), '/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python' (slice is not valid mach-o file)

Zed version and system specs

Zed: v1.11.3+stable.326.952d712dac48a4af2c54fb22c82d82a9d69b72d4 (Zed)
OS: macOS 26.5
Memory: 16 GiB
Architecture: aarch64

Attach Zed log file

Zed.log

2026-07-16T11:02:46+02:00 INFO  [lsp] starting language server process. binary path: "/opt/homebrew/bin/node", working directory: "/Users/sylvaz/.config/zed", args: ["/Users/sylvaz/Library/Application Support/Zed/languages/json-language-server/node_modules/vscode-langservers-extracted/bin/vscode-json-language-server", "--stdio"]
2026-07-16T11:02:57+02:00 INFO  [zed] ========== starting zed version 1.11.3+stable.326.952d712dac48a4af2c54fb22c82d82a9d69b72d4, sha 952d712 ==========
2026-07-16T11:02:57+02:00 INFO  [zed] Using git binary path: "/Applications/Zed.app/Contents/MacOS/git"
2026-07-16T11:02:57+02:00 INFO  [crashes] spawning crash handler process
2026-07-16T11:02:57+02:00 INFO  [crashes] connected to crash handler process after 100ms
2026-07-16T11:02:57+02:00 INFO  [crashes] panic handler registered
2026-07-16T11:02:57+02:00 INFO  [crashes] crash signal handlers installed
2026-07-16T11:02:57+02:00 INFO  [crashes] crash handler registered
2026-07-16T11:02:57+02:00 INFO  [zed::reliability] memory usage: resident 96 MiB, virtual 425828 MiB
2026-07-16T11:02:57+02:00 INFO  [extension_host] extensions updated. loading 24, reloading 0, unloading 0
2026-07-16T11:02:57+02:00 INFO  [prompt_store::rules_to_skills_migration] Rules-to-skills migration already marked done; skipping startup migration
2026-07-16T11:02:57+02:00 INFO  [auto_update] Auto Update: checking for updates
2026-07-16T11:02:57+02:00 ERROR [crates/context_server/src/transport/stdio_transport.rs:58] Broken pipe (os error 32)
2026-07-16T11:02:57+02:00 ERROR [crates/context_server/src/transport/stdio_transport.rs:58] Broken pipe (os error 32)
2026-07-16T11:02:57+02:00 INFO  [workspace] Rendered first frame
2026-07-16T11:02:57+02:00 ERROR [agent] Failed to authenticate provider: ChatGPT Subscription: Sign in with your ChatGPT Plus or Pro subscription to use this provider.
2026-07-16T11:02:59+02:00 INFO  [util] set environment variables from shell:/bin/zsh, path:/Users/sylvaz/.local/bin:/opt/homebrew/bin:/Users/sylvaz/.rd/bin:/Users/sylvaz/.rd/bin:/Users/sylvaz/.antigravity/antigravity/bin:/Library/TeX/texbin:/bin:/opt/homebrew/Cellar/pyenv-virtualenv/1.4.0/shims:/Users/sylvaz/.pyenv/shims:/Users/sylvaz/bin:/Users/sylvaz/go/bin/:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/pkg/env/global/bin:/Library/TeX/texbin
2026-07-16T11:02:59+02:00 INFO  [node_runtime] using Node.js found on PATH: SystemNodeRuntime { node: "/opt/homebrew/bin/node", npm: "/opt/homebrew/bin/npm", scratch_dir: "/Users/sylvaz/Library/Application Support/Zed/node" }
2026-07-16T11:02:59+02:00 ERROR [project::context_server_store] Failed to create context server configuration from settings: from extension "Confluence Context Server" version 1.0.0: missing field `api_token`
2026-07-16T11:02:59+02:00 INFO  [git::repository] opening git repository at "/Users/sylvaz/workspaces/test-narrativ/.git" using git binary "/usr/bin/git"
2026-07-16T11:02:59+02:00 INFO  [agent_client_protocol::util] connection; name="zed"
2026-07-16T11:02:59+02:00 WARN  [agent_servers::acp] agent stderr: [PYI-7606:ERROR] Failed to load Python shared library '/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python': dlopen(/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python, 0x000A): tried: '/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python' (slice is not valid mach-o file), '/System/Volumes/Preboot/Cryptexes/OS/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python' (no such file), '/Users/sylvaz/Library/Application Support/Zed/external_agents/registry/mistral-vibe/v_2.20.0_f96092ef633a0508_e2c4179d51f6dd36/_internal/Python' (slice is not valid mach-o file)
2026-07-16T11:02:59+02:00 INFO  [lsp] starting language server process. binary path: "/Users/sylvaz/Library/Application Support/Zed/languages/package-version-server/package-version-server-v0.0.10", working directory: "/Users/sylvaz/workspaces/test-narrativ", args: []
2026-07-16T11:02:59+02:00 INFO  [lsp] starting language server process. binary path: "/opt/homebrew/bin/node", working directory: "/Users/sylvaz/.config/zed", args: ["/Users/sylvaz/Library/Application Support/Zed/languages/json-language-server/node_modules/vscode-langservers-extracted/bin/vscode-json-language-server", "--stdio"]
2026-07-16T11:02:59+02:00 INFO  [lsp] starting language server process. binary path: "/opt/homebrew/bin/node", working directory: "/Users/sylvaz/workspaces/test-narrativ", args: ["/Users/sylvaz/Library/Application Support/Zed/languages/json-language-server/node_modules/vscode-langservers-extracted/bin/vscode-json-language-server", "--stdio"]

Relevant Zed settings

settings.json

Relevant Keymap

keymap.json

(for AI issues) Model provider details

No response

If you are using WSL on Windows, what flavor of Linux are you using?

No response

[design-fbac]

I second this. Also on macOS 26.5.2 (25F84) / 16gb / Silicon.

[miguelraz]

Thank you for the report! Reproduced with your instructions.

[jaudiger]

I'm also encountering this issue since a few days after having updated Vibe to 2.20.0.