Hi Priya,
Download Mendix version 9.6.0 or any other above 9.6 version but not Version 10, Create one test application in 9 version there you Download this module then take export of the module and import to your new Mendix 10 application.
Hope it helps!
Thanks & Regards,
Manikandan K
Looks like the version you are trying to download is not compatible with your version of StudioPro. I Just tried it in 9.24.x. There it works. In 10.15 it is not available.
You could leave a review or contact the Developer/Publisher
I have used Mendix studio pro 10.12.4.