The CVE-2018-17144 prepared wallet created by the community has been refused connection from the network since 08: 10 UTC on October 16, 2018. If there is a problem with syncing with Wallet, we recommend you to return to Official Wallet v 2.0.1fix. https://github.com/conan-equal-newone/yenten/releases
Please make a backup of Wallet's change carefully.
I sent some coins to my YTN address on Crex24 exchange, but they haven't appeared yet (transaction already has 25 confirmations, and usually 8 was enough). Is it possible that you're affected by this wallet update?