Seems every time Qtum does a hard fork, a large number of nodes disappear - why? I had a similar problem when Qtum last did a hard fork (wallet wouldn't sync), published a solution on their twitter account - got no help, simply got banned! That's when I sold all my Qtum.

Fortunately, they released a new version of their Electrum wallet, and it re-synced, and I got my coins back. That's all I can suggest. But there's no recent update, it seems. Have you tried re-installing?