It's not port forwarding because i haven't had to port forward before and I have played for long time so I don't think its port forwarding, I honestly think Badspot screwed something up
It could be that your local IP has changed, make sure that's not the case by using
ipconfig in your windows command prompt and checking your forwarded ports in your router.
I've had a case where with UPnP port forwarding sticked after Blockland had closed and my local IP changed, not allowing UPnP to port forward for me.
What I did was just remove the ports forwarded for the other IP.