Troubleshoot installation and login changedtroubleshoot-install
Nearest release: v2.1.233, published under an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+1added
Lines−38removed
From line
501
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits23to this page, all time
The whole hunk
from line 501, old and new numbered
/
from line 501
501501
502502### `Failed to fetch version from downloads.claude.ai`
503503
504The installer couldn't reach the download server. This typically means `downloads.claude.ai` is blocked on your network.
504The installer couldn't reach the download server. This typically means `downloads.claude.ai` is blocked on your network. See [Check network connectivity](#check-network-connectivity).
505505
506**Solutions:**
507
5081. **Test connectivity directly**:
509
510 ```bash theme={null}
511 curl -sI https://downloads.claude.ai/claude-code-releases/latest
512 ```
513
514 An `HTTP/2 200` line means the server is reachable. Other results point to the cause:
515
516 * `403`: usually a proxy or network filter blocking the host, or Claude Code is [not available in your region](https://www.anthropic.com/supported-countries)
517 * `5xx`: usually a temporary service issue; wait a few minutes and retry
518
5192. **If behind a proxy**, set `HTTPS_PROXY` so the installer can route through it. See [proxy configuration](/docs/en/network-config#proxy-configuration) for details.
520 ```bash theme={null}
521 export HTTPS_PROXY=http://proxy.example.com:8080
522 curl -fsSL https://claude.ai/install.sh | bash
523 ```
524
5253. **If on a restricted network**, try a different network or VPN, or use an alternative install method:
526
527 On macOS:
528
529 ```bash theme={null}
530 brew install --cask claude-code
531 ```
532
533 On Windows:
534
535 ```powershell theme={null}
536 winget install Anthropic.ClaudeCode
537 ```
538
539 Then run `claude --version` to confirm: the command prints a version number such as `2.1.211 (Claude Code)`. If the shell reports `claude` isn't found, open a new terminal window and retry: the session you installed from keeps its old `PATH`.
540
541506### Wrong install command on Windows
542507
543508If you see `'irm' is not recognized`, `The token '&&' is not valid`, `A parameter cannot be found that matches parameter name 'fsSL'`, or `'bash' is not recognized as the name of a cmdlet`, you copied the install command for a different shell or operating system. If the command prints the script's text instead of installing anything, you ran only part of it.
from line 594
629594Installation was killed before it could finish (exit code 137). This usually means the system ran out of memory.
630595Claude Code needs roughly 512MB of free memory to install. Free up memory, then run this script again.
631596```
632
633Before v2.1.200, the script exited with only the shell's bare `Killed` line and no explanation.
634597
635598Installing needs roughly 512 MB of free memory, and running Claude Code needs more. See the [system requirements](/docs/en/setup#system-requirements).
636599
No line in this hunk matches that.