LDAPS (Can't contact LDAP server ) trusting CA-Cert on ubuntu

my problem is somehow “client”-side as it’s beaus eof the ssl certificate which somehow just worked before afte rimporting the ca-cert like this:
chmod 644 /usr/local/share/ca-certificates/ucs-root-ca.crt && update-ca-certificates

someone has an idea what i can do to trust the cert?