Overview:
The user is unable to export the Vault Document Audit Trail in CSV format even though the language of the Vault is English.
Root Cause:
The affected Vault has the Enable multilingual document handling setting enabled.
Solution:
The solution is to navigate to: Admin --> Settings --> Language and Region Settings and then disable the Enable multilingual document handing setting, as shown.
Related Documentation:
Vault Localization Documentation: Enabling Multi-Language Support
Thank you