Another user recommended the below:
try to add nodes in impleum.conf file located in appData/Roaming/Impleum (if there is no file, you need to create it)
addnone=176.213.142.248
addnone=176.37.230.28
addnone=217.39.97.179
addnone=142.44.161.195
addnone=98.28.225.205
addnone=142.113.11.181
addnone=124.170.150.246
addnone=81.220.220.183
addnone=46.119.37.179
addnone=94.21.17.130
addnone=109.241.110.231
addnone=210.211.124.189
addnone=134.249.161.58
addnone=163.44.197.199
addnone=95.67.74.94
addnone=80.216.197.71