Looks like there was a fork.
Run:
clearbanned
In console.
If you are not on the same block as the explorer load the chain/replace the blocks and chainstate folders from this link:
https://github.com/Kore-Core/KORE/releases/download/v0.13.2.5/blocks_and_chainstate_572974.zipThen connect using these nodes.
https://chainz.cryptoid.info/kore/#!networkaddnode=4tcm2eokytnczoue.onion
addnode=7opqrcxoqhunjaty.onion
addnode=e32du5jp6t5z3twb.onion
addnode=heuayy45jwbi4jt5.onion
addnode=hg6lu4b6lyjbm62d.onion
addnode=hy4gi2x5uuoycz7m.onion
addnode=idruljroiogxpovf.onion
addnode=jkri3w5yg3g5rtm5.onion
addnode=mqo5c4v5i2xpvuyo.onion
addnode=nuj3hft4bm4hpa6v.onion
addnode=p35kjbym6ywmdv3k.onion
addnode=pl6wr6nzvrszakjb.onion
addnode=skqld4re5uc4ncmg.onion
addnode=ubw2lvbaa5aagsns.onion
addnode=woawxq3ph53uzw7b.onion
addnode=y665evnf3e36h4z3.onion
addnode=z2za46fhk3gusgde.onion