Attachment doesnt work in roundcube [Webmail]

[nork613]

Hi.
I have ISPConfig 3.1 and roundcubemail-1.4.
When the user try upload any file in webmail, show this error: (see attachments)

Network Firefox:

Code Select Expand

exec: this.display_message("Error al cargar archivos.","error");
this.remove_from_attachment_list("upload1574083767700");
this.auto_save_start(false);

The error doesnt show in logs.

Thanks for any help.