After creating a "Latest Content" block in the ezflow frontpage, an error is shown in the redirect debug output:

Warning: PHP: E_WARNING

Invalid argument supplied for foreach() in /var/www/apache2php53/ezp/.run/extension/ezflow/classes/fetches/ezflowlatestcontent.php on line 66

From this point forward, even if the block is deleted, the error does not seem to disappear (even after running ezflow-cleanup, clearing caches), and its occurrence will actually multiply for (apparently) every other block you create.

Steps to reproduce

1. Activate debug ouput & debug redirect
2. Edit the ezflow frontpage
3. Add a "Latest content" block
4. Publish it, the warning message will be visible in the debug redirect output