Hi candy69corn,
It’s been a while since I last looked into this, but let’s see.
If you’re referring to the cave where the prince is hiding (“THE SHORE CAVE,” located on CIRHENA A2), it should give you a password (S.PASSWORD) the first time you interact with it. You then need to use that password when trying to enter the inn on WISSLAN, located on CIRHENA A3. Can you confirm whether you have it in your items?
I’m really glad you’re enjoying the game! I haven’t heard of anyone having this issue before, though of course that doesn’t mean new bugs can’t still appear, unfortunately. If you continue to have problems, I’ll look further into it until we figure out what’s going on.
Thank you so much for your encouragement! It truly means the world to me! I wish you the best of luck with your own projects as well.