Upgrading to XWiki 10.9 fails on Oracle

STEPS TO REPRODUCE

Preconditions: An older instance of XWiki (e.g. 9.11.8) and an instance of XWiki 10.9 (to which will be migrated) are available. Both instances are configured with Oracle 11.2.
1. Go to the newer instance (10.9) and copy/cut the

[...]webapps\xwiki

folder and replace it (first delete the old one) in the same location on the older version

2. Start the instance and follow the Distribution Wizard through the upgrade process

EXPECTED RESULTS

The upgrade process is completed successfully without errors.

ACTUAL RESULTS

Instead of starting the Distribution Wizard for the upgrade process, the browser gets a 'HTTP Error 500', some huge errors in the console and the upgrade fails. Log attached.

It was used ojdbc8.jar connector.