github-desktop/docs/known-issues.md

# Known Issues

This document outlines acknowledged issues with GitHub Desktop, including workarounds if known.

## What should I do if...

### I have encountered an issue listed here?

Some known issues have a workaround that users have reported addresses the issue. Please try the workaround for yourself to confirm it addresses the issue.

### I have additional questions about an issue listed here?

Each known issue links off to an existing GitHub issue. If you have additional questions or feedback, please comment on the issue.

### My issue is not listed here?

Please check the [open](https://github.com/desktop/desktop/labels/bug) and [closed](https://github.com/desktop/desktop/issues?q=is%3Aclosed+label%3Abug) bugs in the issue tracker for the details of your bug. If you can't find it, or if you're not sure, open a [new issue](https://github.com/desktop/desktop/issues/new).

## macOS

### 'The username or passphrase you entered is not correct' error after signing into account - [#3263](https://github.com/desktop/desktop/issues/3263)

This seems to be caused by the Keychain being in an invalid state, affecting applications that try to use the keychain to store or retrieve credentials. Seems to be specific to macOS High Sierra (10.13).

**Workaround:**

- Open `Keychain Access.app`
- Right-click on the `login` keychain and try locking it
- Right-click on the `login` keychain and try unlocking it
- Sign into your GitHub account again

## Windows

### Window is hidden after detaching secondary monitor - [#2107](https://github.com/desktop/desktop/issues/2107)

This is related to Desktop tracking the window position between launches, but not changes to your display configuration such as removing the secondary monitor where Desktop was positioned.

**Workaround:**

 - Remove `%APPDATA%\GitHub Desktop\window-state.json`
 - Restart Desktop

### Certificate revocation check fails - [#3326](https://github.com/desktop/desktop/issues/3326)

If you are using Desktop on a corporate network, you may encounter an error like this:

```
fatal: unable to access 'https://github.com/owner/name.git/': schannel: next InitializeSecurityContext failed: Unknown error (0x80092012) - The revocation function was unable to check revocation for the certificate.
```

GitHub Desktop by default uses the Windows Secure Channel (SChannel) APIs to validate the certificate received from a server. Some networks will block the attempts by Windows to check the revocation status of a certificate, which then causes the whole operation to error.

**Workaround:**

To use the classic OpenSSL behavior in Git, you'll need a PEM file containing certificates that are considered trusted. The [public list](https://curl.haxx.se/docs/caextract.html) provided by the curl project can be used if you are not connecting to a GitHub Enterprise instance which has it's own distinct certificates.

Once you've downloaded that PEM file somewhere, open a shell with Git and run these commands:

```shellsession
$ git config --global http.sslBackend "openssl"
$ git config --global http.sslCAInfo "C:/path with spaces/to/directory/cacert.pem"
```

Ensure you use forward slashes for the path when setting the `sslCAInfo` value.

### Using a repository configured with Folder Redirection - [#2972](https://github.com/desktop/desktop/issues/2972)

[Folder Redirection](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc753996(v%3dws.11)) is an feature of Windows for administrators to ensure files and folders are managed on a network server, instead.

**Not supported** as Git is not able to resolve the working directory correctly:

```shellsession
2017-09-21T23:16:05.933Z - error: [ui] `git -c credential.helper= lfs clone --recursive --progress --progress -- https://github.com/owner/name.git \\harvest\Redirected\andrewd\My Documents\GitHub\name` exited with an unexpected code: 2.
Cloning into '\\harvest\Redirected\andrewd\My Documents\GitHub\name'...
remote: Counting objects: 4, done.
remote: Compressing objects:  33% (1/3)
remote: Compressing objects:  66% (2/3)
remote: Compressing objects: 100% (3/3)
remote: Compressing objects: 100% (3/3), done.
remote: Total 4 (delta 1), reused 4 (delta 1), pack-reused 0
fatal: unable to get current working directory: No such file or directory
warning: Clone succeeded, but checkout failed.
You can inspect what was checked out with 'git status'
and retry the checkout with 'git checkout -f HEAD'

Error(s) during clone:
git clone failed: exit status 128
```

### Enable Mandatory ASLR triggers cygheap errors - #3096

Windows 10 Fall Creators Edition (version 1709 or later) added enhancements to the Enhanced Mitigation Experience Toolkit, one being to enable Mandatory ASLR. This setting affects the embedded Git shipped in Desktop, and produces errors that look like this:

```
      1 [main] sh (2072) C:\Users\bdorrans\AppData\Local\GitHubDesktop\app-1.0.4\resources\app\git\usr\bin\sh.exe: *** fatal error - cygheap base mismatch detected - 0x2E07408/0x2EC7408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
```

Enabling Mandatory ASLR affects the MSYS2 core library, which is relied upon by Git for Windows to emulate process forking.

**Not supported:** this is an upstream limitation of MSYS2, and it is recommend that you either disable Mandatory ASLR or whitelist all executables under `<Git>\usr\bin` which depend on MSYS2.