Why can't wildcard SSL be selected in Kerio?

Question

Digital certificates

Greetings comrades!
Just now I ordered a WildCard certificate from Comodo, well, these are those that are multi-domains - *.domain.ru, so that it is not spent on each domain on the network.
But kerio does not want to choose it as the main one. The import is normal, it is present in the list, but you cannot select this certificate anywhere: neither for vpn, nor radius, nor as the main one for the web muzzle. Those. in fact, there is a certificate, but it is not usable. Who faced it?