So I followed the game's story and once I talked to Terragon the game bugged completely after it said "I'll be with you in just a second." the screen fades and nothing else appears even after waiting for a minute. I made a few new saves and tried again, still same thing, even in the browser version.

you need to go in rest then go to building next to his shop

you need to go in and rest then enter to building next to his shop