Hyper-V Replication Configuration ERROR - You Can see Certificate but not select it in Hyper-V Manager - install a valid certificate - but certificate is install in LOCAL SYSTEM

Dear Microsoft,

We have install an PFX certificate with private key, but in Hyper-V we cannot select the certificate.

the certificate is visibel in the screen......and in certificates. error: Install a valid certificate and try again. What can be the problem?