Your Temtem are safe. Your storage is locked due to a change in how Temtem storage works during the Early Access. In order to unlock it, go to one of these Temporiums and progress through the new quest:
- Briçal de Mar (Deniz)
- Nanga (Omninesia)
- Quetzal (Tucma)
- Vumbi (Kisiwa)
- Neoedo (Cipanku)
- Lochburg (Arbury)
For players with a complete Temdeck right now, the locked spaces will be greyed out and you won’t be able to use those Tems until you progress on the quest, but don’t worry: you won’t lose anything in the process, and once you unlock that Temdeck page you’ll find your Tems are exactly how you left them.