HA no longer reachable

Hello Everyone

First post and need some help please

I have spent the last 2 weeks reading posts and watching videos and managed to get HA in Virtualbox up and working fine on my Windows 10 server

I then managed to install integrations and various repositories and again all Woking fine until today

I was attempting to integrate Smart Things so followed a YouTube video and all was going fine until I had to add to the configuration.yaml unfortunately this wouldn’t work so I deleted what I imputed and restarted HA and now I can no longer browse to my HA

Virtualbox looks ok and I can ping the IP Address but when I browse, I get this reply

This site can’t be reached

Unfortunately, I did not take any backups or snapshots (I don’t know how yet)

Anyone help please??