[SOLVED] Problem - Native Export metadata - HTTP ERROR 500 (

Hi, everybody.
Aftermigration from 2.4 to don`t working Native export metadata.
I see: HTTP ERROR 500

The second problem, after Upgrade, the system does not link articles to PDF files, despite the fact that the entry is in config.php.

This topic is SOLVED.
I upggraded from OJS 2.4.8 to, after from to It works.