<?php foreach ($slider_items as $slider_item): ?> line error

When you want to use the dynamic display block module you should use version RC6, when you want to test new functionality in the module to help module development. I see you are a new user at Drupal.org, so I assume you want to use the module.

Set version to RC6.
Set category to support request.

You can use search in the issue queue on all issues and find the solution in other issues. This way you don't have to wait for an answer.

Have a look at the FAQ question warning: Invalid argument supplied for foreach() in... solution? at http://ddblock.myalbums.biz

If you can not find the solution there, please send the information stated in the faq question.

Hope this helps you further, please let me know.

Set status to fixed, assume poster solved the issue, 4 weeks no activity.