The server uses a certificate with a basic constraints extension identifying it as a certificate authority. For a properly-issued certificate, this should not be the case.
Server asosiy majburiy kengaytmalarni tasdiqdan o‘tkazishda uni tasdiqdan o‘tkazish sertifikati kabi sertifikatdan foydalanadi. Mos tushadigan sertifikatlar bunday bo‘lmaydi.