This may or may not help at all, but I had issues with connting to my server until I went into my router and reserved the IP that my server is using, If youdl did not do this right away and your router decided to give you a new IP then well your gonna have to set it up as a new server unless you know the IP you first used and manually assign it back to that server under the TrueNAS side. I also had an issue with network bridging when setting it up on the hexos side it will give out a new IP even if you have your router setup to only use a certain IP, so again you will have to go into the truenas side and manually assign the correct IP to that bridge, hopefully this will help someone, idk ¯\_(ツ)_/¯ it might be something else all together but I'm kinda shooting in the wind with what little info that was provided.