If you visit your domains, although you will see error message but it has unicode of your domain name, so you can add your domains using that unicod-ed domain named.
I’ve fetched them, try to add these: xn--otanj-udbb.com (šoštanj.com) xn--alec-kbb.com (žalec.com) xn--domale-5pb.com (domžale.com) xn--radee-kya.com (radeče.com)