Quick answer: Fix the type mismatches the compiler flags, add types the inference cannot resolve, and use explicit casts where a value's type is genuinely narrower than declared.
Static typing errors after a refactor are the compiler enforcing types it now knows. Fixing the mismatches resolves them. Here is how.
How to fix it
1. Fix the flagged mismatches
Each error names a type mismatch — assigning the wrong type, returning the wrong type. Correct the value or the declared type so they agree. These were latent bugs static typing now exposes.
2. Help the inference
Where GDScript cannot infer a type (a dynamically obtained node, a variant), add an explicit type hint or annotation so it knows what to expect, resolving unknown-type errors.
3. Cast where narrowing is needed
When a value is typed broadly but you know it is a specific subtype, cast it explicitly so the compiler accepts the narrower use, rather than leaving a type error or reverting to untyped.
Catching the ones you can't reproduce
The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.
Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.
This is where a tool like Bugnet earns its place. Its SDK captures every Godot error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.
A crash you can name from its stack trace is a crash you can usually fix in minutes.