Export to Exel ERROR 500

[richie]

Hi.

I try to export the contact list to XLSX but i get a 500 error.
Export to CSV still works.

All new changes (github) were already on the system.

Version 4.8.1

ServerLog:

Espo.ERROR: Display Error: , Code: 400 URL: /api/v1/Contact/action/export [] []
Espo.ERROR: API [GET]:/:controller/action/:action, Params:Array ( [controller] => Account [action] => export ) , InputData: - [] []


Thanks.