"Save all to Files" and "Download Zip" don't work with *.EML attachments

[EtagiBI]

Steps to reproduce

1. Send a couple of emails as attachments to your NC account
2. Open incoming message with these attachments
3. Click "Save all to Files"
4. Choose any folder and confirm your choice
5. Check the folder - *.EML attachments are not there OR
6. Click "Download Zip"
7. See the error (presumably coming from Horde library)

Expected behavior

For "Save all to Files" button: all *.EML attachments are copied to the folder of user's choice For "Download Zip" button: all *.EML attachments are downloaded as a single *.ZIP archive

Actual behavior

Please, see "Stepts to reproduce" section above

Mail app version

3.6.0-alpha.3

Mailserver or service

Zimbra

Operating system

Any

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database

PostgreSQL

Additional info

No response