I had the same problem with syncing my wallet, but now I have 17 active connections and working just fine.
How to check addnode list? And what should be listed there?
Now only 1 connection left and still doesn't synchronize
Inside .conf file, copy and past bellow.(what I'm using right now and working just fine with it.)
addnode=sigt.suprnova.cc
addnode=104.197.159.83
addnode=104.197.145.21
addnode=104.197.80.61
addnode=146.148.55.27
addnode=162.222.176.74
addnode=104.154.95.6
addnode=104.154.94.55
addnode=104.154.76.142
addnode=104.211.186.5
addnode=52.172.209.58
addnode=52.174.102.46
addnode=52.187.13.149
addnode=54.175.225.242
addnode=122.129.64.13
addnode=122.129.64.14
addnode=122.129.64.15
addnode=122.129.64.16
addnode=203.128.6.219
addnode=104.154.193.236
addnode=104.198.232.113
addnode=104.199.11.56
addnode=130.211.127.202
addnode=35.184.49.142
addnode=35.189.14.132
addnode=35.185.18.85
addnode=35.184.121.184
addnode=6jsbbxzfd5wyhs5i.onion
addnode=6fzxqhdvvevev75v.onion
addnode=ab7vmf6j2rajwo33.onion
addnode=z6guowp3wn3fnekm.onion
addnode=tl3bna25hbr5r2eg.onion
addnode=a4scscaet5aplljx.onion
addnode=w3rimjo7drskmbbd.onion