TYPO3 v8 has reached its end-of-life March 31st, 2020 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.

You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.

A Note on Image Processing

TYPO3 CMS relies on ImageMagick or GraphicsMagic to generate on the fly images matching the specified sizes. If you do not see all expected images it could that neither ImageMagick nor GraphicsMagic are installed on your server or that your installation is not properly configured.

For more help on the topic, please refer to the Installation Guide.

You could also ask for help in the installation forums.