Connecting AnyTM translation memories

Hi!

I am working in Studio 2021. A client sent me a project on GroupShare and I received it. But they ask me to link a TM to the project and, when I go in the Project Settings and I add this specific TM, it says that it can only be added using the AnyTM option. But this option is grayed out so I cannot select it.

What should I do to have access to the AnyTM option so as to be able to link this TM please?

Thank you in advance for your precious help!

Kind regards,

Sidonie