Run the game without SMAPI at least once so it can do first-time setup. The official website: Installing SMAPI on Windows Part 1: install SMAPI. Compatible with most mods for SMAPI 0.40+.
Requires Stardew Valley 1.2.30+ on Linux/Mac/Windows. 2.3 also reintroduces the GameEvents.FirstUpdateTick event, adds an IsSuppressed flag to input events so mods can optionally avoid handling keys another mod has already handled, and fixes several issues. For modders, this adds mod-provided APIs, which allow simple integrations between mods even without direct dependencies (see ). What's new in SMAPI 2.3? For players, this mainly adds a and fixes a few issues.