[SalesForce] Can’t deploy reports with workbench

I've retrieved some reports from my org, made changes to them and am trying to deploy them again through workbench. Everything went well until I try to deploy my zipped directory containing the package.xml and reports folder. Every single report fails with a '…not found in zipped directory' error.

I've tried every directory name and structure I could find a reference to online, with and without singlePackage on, nothing works. The folder and reportnames are correct, case and all.

Currently the structure looks like this:

src.zip
- src
    - package.xml
    - reports
        - ReportFolderDeveloperNameA
            - ReportName1.report
        - ReportFolderDeveloperNameB
            - ReportName2.report

package.xml looks like:

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <types> 
        <members>ReportFolderDeveloperNameA/ReportName1.report</members>  
        <members>ReportFolderDeveloperNameB/ReportName2.report</members>
        <name>Report</name>
    </types>
    <version>38.0</version>
</Package> 

I have no clue what's going wrong, perhaps someone else will know.