Since the file version you mentioned (v0.3.1) is an early development build, you might also find paper by looting desks or bookshelves in ruins if the crafting recipe hasn't been unlocked or implemented yet. The Last Goblin Walkthrough

: Look for Bark or Plant Fibres from trees or swamp vegetation.

: Combine your gathered plant materials with Water (using a bucket or nearby water source) in your crafting interface.