[Bug]: XLSX/CSV export does not work

[heigpa]

Expected behavior

• XLSX or CSV of customers should be created and downloaded

Actual behavior

• Export failed message appears
• Error 500 in console

Steps to reproduce

• Login as admin (Platform Version Testsystem, Platform Version 2025.1)
• Open Customers from menu
• Click on export XLSX/CSV

[heigpa]

works now. thx