B2bcoin web wallet which support Sikka, is removing other then b2b coin wallets. If you have Sikka in their web wallet. Please withdraw as soon as possible. They will soon support for Sikka wallet.
You can visit their telegram for any questions: https://t.me/joinchat/Fxlb2Qw8ivAta7iYgM0Wiw
You can post on their thread for any help in that: https://bitcointalk.org/index.php?topic=2098163

Have patience as they are facing some technical issues because of multiple coins working. So visit above forums to get help.
We will not be responsible for any coins lost because of their wallet.