Question 1

How to fix build failure with 404 error when fetching Graffino/Browser-Update dependency?

Accepted Answer

The upstream GitHub repository Graffino/Browser-Update was deleted, causing a 404 error during dependency resolution. The ownCloud project plans to drop this dependency entirely. Temporary fix: The repository has been restored, so builds may pass for now. Permanent workaround: Remove the dependency from your project:

1. Delete the `browser-update` entry from `package.json`.
2. Run `yarn install` to update the lockfile.
3. Ensure no code relies on `browser-update`.

If you still need the package, consider using a fork or alternative.

Question 2

How to fix 'Trying to access array offset on value of type bool' error in ownCloud SFTP external storage?

Accepted Answer

This is a PHP 7.4 compatibility issue in `apps/files_external/lib/Lib/Storage/SFTP.php`. The `filetype()` method tries to access array keys from `stat()` which can return `false` instead of an array.

**Fix**: Add checks before accessing `$stat['type']`. Edit `apps/files_external/lib/Lib/Storage/SFTP.php` and replace the `filetype()` function with:

```php
public function filetype($path) {
    try {
        $stat = $this->getConnection()->stat($this->absPath($path));
        if (!is_array($stat) || !array_key_exists('type', $stat)) {
            return false;
        }
        if ((int) $stat['type'] === NET_SFTP_TYPE_REGULAR) {
            return 'file';
        }
        if ((int) $stat['type'] === NET_SFTP_TYPE_DIRECTORY) {
            return 'dir';
        }
    } catch (\Exception $e) {
    }
    return false;
}
```

This stops the log spam. A similar fix may be needed for `apps/files_external/lib/Lib/RSAStore.php` line 107 (null array access), but the issue primarily covers SFTP.php. After applying, monitor the logs to verify the errors are gone.

Question 3

Why are SVG previews not generated for some SVG files with gradients in ownCloud?

Accepted Answer

In ownCloud, SVG previews may fail for files containing internal references like gradients (`xlink:href="#linearGradient4061"`). The preview provider incorrectly rejects all SVGs with `xlink:href`, even if the reference is local.

**Workaround:** Edit `./lib/private/Preview/SVG.php` and comment out the following block inside the `getThumbnail` function:
```php
// Do not parse SVG files with references
if (\stripos($content, 'xlink:href') !== false) {
    return false;
}
```
This will allow internal references. For a safer approach, modify the check to only return false if the reference points to an external resource (e.g., starts with `http`).

**Example patched line:**
```php
if (preg_match('/xlink:href\s*=\s*["\']https?:/i', $content)) {
    return false;
}
```
After editing, restart your webserver. Track the official fix via ownCloud issue #41218.

Question 4

How to disable the web-based updater in ownCloud to prevent update failures?

Accepted Answer

Add the following line to your `config/config.php` file:

```php
'upgrade.disable-web' => true,
```

This disables the Web GUI update button, preventing accidental use of the error-prone built-in updater. Command-line updates are still possible, but manual upgrade is recommended. See the [documentation](https://doc.owncloud.com/server/10.13/admin_manual/configuration/server/config_sample_php_parameters.html#disable-the-web-based-updater) for details.

Question 5

How to fix 'occ db:convert-type' failing to migrate all tables when converting from SQLite to MySQL in ownCloud 10?

Accepted Answer

The `occ db:convert-type` command is known to be broken in ownCloud 10.0, as it fails to convert tables created via database migrations (e.g., `oc_external_config`, `oc_external_mounts`). There is no full fix yet. However, if your instance only contains files without any shares, calendar events, or contacts metadata, you can migrate manually:

1. Set up a fresh ownCloud instance with MySQL.
2. Reuse your original `data` directory.
3. Run `occ files:scan --all` to re-index all files.

This bypasses the need for database conversion. For instances with richer metadata, a permanent solution is still in development.

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