Found out that if you were running the old miner your IP would en up in the banned list, so you cannot sync.
Check it out here:
https://api.getnerva.org/banlist.txt

So the next question is, how do I get my IP delisted from the banned list?
Got it (updated):

Go to Discord: https://discord.gg/jsdbEns

Type
!unban

BTW, with the same discord check if banned with !bans