The Belgium eID support suggests that if an application isn't correctly configured, you should download the software again from the official site.
The service provider (bank, government, or employer) updated their security certificates, and your stored "old" EID no longer matches the "new" one they are seeing. The "Updated" Loop: error r225 eid new
To minimize the chances of encountering Error R225 EID New in the future: The Belgium eID support suggests that if an
Troubleshooting Error R225 on New eID Cards: Causes and Solutions or employer) updated their security certificates