Hi @Raumen837,
Start by making sure Apache access files are correctly rotated to /opt/kaltura/web/logs, that they contain records like:
GET /api_v3/index.php?service=stats.*&action=collect
and that /opt/kaltura/web/logs is accessible by the 'kaltura' user on the server running the DWH scripts.
Then, run each script from /etc/cron.d/kaltura-dwh, manually from the shell and be sure to do so as the 'kaltura' user.
After each execution, check /opt/kaltura/dwh/logs for strings that begin with "ERROR".