Wrapping redirect with actionResult doesn't work in Svelte 5

[junekhan]

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Description
When I try returning a redirect response as follows:

return actionResult("redirect", "/", {
				status: 302,
				message: {
					type: "success",
					message: "Success! Heading to the login page!"
				},
			});

I get the error:

Data returned from action inside /reset-password is not serializable. Form actions need to return plain objects or fail(). E.g. return { success: true } or return fail(400, { message: "invalid" });

My packages:

"svelte": "^5.1.10",
"sveltekit-superforms": "^2.20.0",