Filename globbing is not working

[JPGygax68]

My wsdl -> typescript script in package.json is this:

"generate": "npx wsdl-tsclient ./wsdl/**/*.wsdl -o ./generated"

Adapted from the example in the readme. But I get the message:

Generating soap client from "*.wsdl"
Error occured while generating client "*.wsdl"
        Error: ENOENT: no such file or directory, open 'C:\Users\taagyha1\edu\sap-client-tests\wsdl\**\*.wsdl'
1 Errors occured!

Specifying a single WSDL file without globbing works.
I'm using Node version 16.16.0 on Windows 10.