My party was defeated in the Lost Grove and I was put back to the Barracks (I am only at Stage 2), I don't have any of the buildings built because I don't have the materials, so I left the zone to go revive my pets. But now anytime I click on anything in Astryl's Vale, I get put to Astryl's Tranquility even though I've beaten that zone. I can't even go to Ethernia. What happened? How do I fix this?

EDIT: Fixed this by pressing "Exit Zone" button on the toolbar on Astryl's Tranquility!

Hi, just in case there's still any confusion despite the issue being fixed:

In the Astryl's Vale Zones(Sweet Blossom Orchard, Astryl's Tranquility, and The Lost Grave), once you're in one of those zones, you can't go to another zone in Astryl's Vale or into Ethernia, or if a Seasonal Fest is active, a Seasonal Fest Zone, until leaving the current one you're in by either hitting the "Exit Zone" button, or if you're in the LG, hitting either the exit zone button, or leaving through the barracks.
The same applies to the Seasonal Fest Zones, you must exit them as well to explore an Astryl's Vale zone.

However, you can still explore all the earlier zones despite being in one of those zones, unless you're in the LG, then to battle in a different early zone, you'd have to leave the LG.
You can still assign missions while in the LG in the main towns of the previous sections of the game(Esior's Haven in Viridian Meadows and Sanctuary of Saerielle in Umbra Forest), but from what I've experienced, cannot buy items from those towns while in the LG.

If you accidentally clicked Astryl's Tranquility when you returned to Astryl's Vale, when trying to go to another part of Astryl's Vale, it's likely how you got stuck in Astryl's Tranquility. I've definitely misclicked the zone I intended to go to quite a few times myself.

I just wanted to give a little explanation in case any confusion still remained, I hope this helped some. ^-^