diff --git a/app/components/Toaster.tsx b/app/components/Toaster.tsx
index a83d34f..b523fbc 100644
--- a/app/components/Toaster.tsx
+++ b/app/components/Toaster.tsx
@@ -1,7 +1,7 @@
 import { XIcon } from '@primer/octicons-react'
-import { type AriaToastProps, useToast, useToastRegion } from '@react-aria/toast'
-import { ToastQueue, type ToastState, useToastQueue } from '@react-stately/toast'
-import { type ReactNode, useRef } from 'react'
+import { AriaToastProps, useToast, useToastRegion } from '@react-aria/toast'
+import { ToastQueue, ToastState, useToastQueue } from '@react-stately/toast'
+import { ReactNode, useRef } from 'react'
 import { Button } from 'react-aria-components'
 import { createPortal } from 'react-dom'
 import { ClientOnly } from 'remix-utils/client-only'
@@ -14,6 +14,8 @@ type ToastProperties = AriaToastProps<ReactNode> & {
 
 function Toast({ state, ...properties }: ToastProperties) {
 	const reference = useRef(null)
+
+	// @ts-expect-error: RefObject doesn't map to FocusableElement?
 	const { toastProps, titleProps, closeButtonProps } = useToast(properties, state, reference)
 
 	return (
@@ -52,11 +54,15 @@ export function toast(text: string) {
 export function Toaster() {
 	const reference = useRef(null)
 	const state = useToastQueue(toasts)
+
+	// @ts-expect-error: React 19 has weird types for Portal vs Node
 	const { regionProps } = useToastRegion({}, state, reference)
 
 	return (
 		<ClientOnly>
-			{() => createPortal(
+			{
+				// @ts-expect-error: Portal doesn't match Node in React 19 yet
+				() => createPortal(
 				state.visibleToasts.length >= 0 ? (
 					<div
 						className={cn(
diff --git a/app/routes/_data.acls._index/route.tsx b/app/routes/_data.acls._index/route.tsx
index 3846bce..6108640 100644
--- a/app/routes/_data.acls._index/route.tsx
+++ b/app/routes/_data.acls._index/route.tsx
@@ -55,7 +55,7 @@ export async function loader({ request }: LoaderFunctionArgs) {
 	let modeGuess = 'database' // Assume database mode
 	if (context.config.read) {
 		const config = await loadConfig()
-		modeGuess = config.policy.mode
+		modeGuess = config.policy?.mode ?? 'database'
 	}
 
 	// Attempt to load the policy, for both the frontend and for checking
@@ -96,7 +96,8 @@ export async function loader({ request }: LoaderFunctionArgs) {
 			return {
 				read: false,
 				write: false,
-				mode: modeGuess
+				mode: modeGuess,
+				policy: null
 			}
 		}
 
@@ -106,7 +107,8 @@ export async function loader({ request }: LoaderFunctionArgs) {
 		return {
 			read: true,
 			write: true,
-			mode: modeGuess
+			mode: modeGuess,
+			policy: null
 		}
 	}
 }
@@ -114,7 +116,7 @@ export async function loader({ request }: LoaderFunctionArgs) {
 export async function action({ request }: ActionFunctionArgs) {
 	const session = await getSession(request.headers.get('Cookie'))
 	if (!session.has('hsApiKey')) {
-		return json({ success: false }, {
+		return json({ success: false, error: null }, {
 			status: 401,
 		})
 	}
@@ -129,16 +131,18 @@ export async function action({ request }: ActionFunctionArgs) {
 			}
 		)
 
-		return json({ success: true, policy })
+		return json({ success: true, policy, error: null })
 	} catch (error) {
 		log.debug('APIC', 'Failed to update ACL policy with error %s', error)
+
+		// @ts-ignore: Shut UP we know it's a string most of the time
 		const text = JSON.parse(error.message)
 		return json({ success: false, error: text.message }, {
 			status: error instanceof HeadscaleError ? error.status : 500,
 		})
 	}
 
-	return json({ success: true })
+	return json({ success: true, error: null })
 }
 
 export default function Page() {
@@ -154,6 +158,7 @@ export default function Page() {
 			return
 		}
 
+		// @ts-ignore: useDebounceFetcher is not typed correctly
 		if (fetcher.data.success) {
 			toast('Updated tailnet ACL policy')
 		} else {
@@ -183,6 +188,7 @@ export default function Page() {
 		}
 
 		// If we have a failed fetcher state allow the user to try again
+		// @ts-ignore: useDebounceFetcher is not typed correctly
 		if (fetcher.data?.success === false) {
 			return false
 		}
@@ -231,8 +237,11 @@ export default function Page() {
 				.
 			</p>
 
-			{fetcher.data?.success === false
+			{
+				// @ts-ignore: useDebounceFetcher is not typed correctly
+				fetcher.data?.success === false
 				? (
+					// @ts-ignore: useDebounceFetcher is not typed correctly
 					<ErrorView message={fetcher.data.error} />
 				) : undefined}
 
@@ -291,7 +300,7 @@ export default function Page() {
 						</TabPanel>
 						<TabPanel id="diff">
 							<Differ
-								left={data.policy}
+								left={data?.policy ?? ''}
 								right={acl}
 							/>
 						</TabPanel>
@@ -335,13 +344,13 @@ export default function Page() {
 					<Button
 						isDisabled={disabled}
 						onPress={() => {
-							setAcl(data.policy)
+							setAcl(data?.policy ?? '')
 						}}
 					>
 						Discard Changes
 					</Button>
 				</>
-			) : <Unavailable mode={data.mode} />}
+			) : <Unavailable mode={data.mode as "database" | "file"} />}
 		</div>
 	)
 }
diff --git a/app/routes/_data.machines._index/dialogs/new.tsx b/app/routes/_data.machines._index/dialogs/new.tsx
index dd35dc9..429beba 100644
--- a/app/routes/_data.machines._index/dialogs/new.tsx
+++ b/app/routes/_data.machines._index/dialogs/new.tsx
@@ -18,7 +18,7 @@ export interface NewProps {
 }
 
 export default function New(data: NewProps) {
-	const fetcher = useFetcher()
+	const fetcher = useFetcher<{ success?: boolean }>()
 	const mkeyState = useState(false)
 	const [mkey, setMkey] = useState('')
 	const [user, setUser] = useState('')
diff --git a/app/routes/_data.settings._index/route.tsx b/app/routes/_data.settings._index/route.tsx
index 920db35..6a4e825 100644
--- a/app/routes/_data.settings._index/route.tsx
+++ b/app/routes/_data.settings._index/route.tsx
@@ -31,10 +31,7 @@ export default function Page() {
 					</Link>
 				</p>
 			</div>
-			<RemixLink
-				to="/settings/auth-keys"
-				name="Auth Keys"
-			>
+			<RemixLink to="/settings/auth-keys">
 				<span className={cn(
 					'text-lg font-medium',
 					'text-gray-700 dark:text-gray-300',
diff --git a/app/routes/_data.settings.auth-keys._index/dialogs/new.tsx b/app/routes/_data.settings.auth-keys._index/dialogs/new.tsx
index 3e74c97..e8b8807 100644
--- a/app/routes/_data.settings.auth-keys._index/dialogs/new.tsx
+++ b/app/routes/_data.settings.auth-keys._index/dialogs/new.tsx
@@ -94,7 +94,7 @@ export default function AddPreAuthKey(data: Props) {
 									onChange={() => { setReusable(!reusable) }}
 								/>
 							</div>
-							<input type="hidden" name="reusable" value={reusable} />
+							<input type="hidden" name="reusable" value={reusable.toString()} />
 							<div className="flex justify-between items-center mt-6">
 								<div>
 									<Dialog.Text className="font-semibold">
@@ -121,7 +121,7 @@ export default function AddPreAuthKey(data: Props) {
 									}}
 								/>
 							</div>
-							<input type="hidden" name="ephemeral" value={ephemeral} />
+							<input type="hidden" name="ephemeral" value={ephemeral.toString()} />
 							<div className="mt-6 flex justify-end gap-2 mt-6">
 								<Dialog.Action
 									variant="cancel"
diff --git a/app/routes/_data.settings.auth-keys._index/key.tsx b/app/routes/_data.settings.auth-keys._index/key.tsx
index c11cc9e..0af61c7 100644
--- a/app/routes/_data.settings.auth-keys._index/key.tsx
+++ b/app/routes/_data.settings.auth-keys._index/key.tsx
@@ -39,7 +39,7 @@ export default function AuthKeyRow({ authKey, server }: Props) {
 				<Button
 					variant="light" 
 					className="my-4"
-					onClick={async () => {
+					onPress={async () => {
 						await navigator.clipboard.writeText(
 							`tailscale up --login-server ${server} --authkey ${authKey.key}`
 						)