You have already updated the directories of Admidio with a new version. Now the database has to be updated from the current version 4.3.9 to the version 4.3.12, so that Admidio can run with the new version.
If you have questions or problems with the update, please check our update instruction or contact our support forum.
Current database version: 4.3.9
Database version after update: 4.3.12