appdata lists the following as screenshot

```
      <image>http://kde.org/images/screenshots/gemini.png</image>

```

which is coming back 404

```
➜ curl http://kde.org/images/screenshots/gemini.png -o /dev/null -D - -sSL
HTTP/1.1 302 Found
Date: Mon, 08 Jan 2018 16:45:19 GMT
Server: Apache/2.4.7 (Ubuntu)
Strict-Transport-Security: max-age=15768000
Location: https://www.kde.org/images/screenshots/gemini.png
Cache-Control: max-age=0
Expires: Mon, 08 Jan 2018 16:45:19 GMT
Content-Length: 305
Content-Type: text/html; charset=iso-8859-1

HTTP/1.1 404 Not Found
Date: Mon, 08 Jan 2018 16:45:19 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.22
Strict-Transport-Security: max-age=15768000
Transfer-Encoding: chunked
Content-Type: text/html
```

Please fix and ideally switch to the KDE product screenshot hosting @ https://phabricator.kde.org/source/websites-product-screenshots/browse/master/README.md