You need to create a project a mendix version mentioned (8.12.0 – 8.18.99)
Then add the module via the marketplace.
Close the project and open the project with your current project version 9.21.0, this will upgrade the module to this version (might need to fix any errors that occur).
Then export the module package.
Open the project where you need the module and import the exported module and you are done.