show your code for route handler

The error was within the middleware, I am trying to use next-intl

we can't help you without any code... is there some that generated the error?

sorry I thought I sent the code

middleware.ts

import { NextRequest } from "next/server";
import { withAuth } from "next-auth/middleware";
import createIntlMiddleware from "next-intl/middleware";
import { localePrefix, locales } from "./i18n.config";

const publicPages = ["/", "/login"];

const intlMiddleware = createIntlMiddleware({
  locales,
  localePrefix,
  defaultLocale: locales[0],
});

const authMiddleware = withAuth((req) => intlMiddleware(req), {
  callbacks: {
    authorized: ({ token }) => token != null,
  },
  pages: {
    signIn: "/login",
  },
});

export default function middleware(req: NextRequest) {
  const publicPathnameRegex = RegExp(
    `^(/(${locales.join("|")}))?(${publicPages
      .flatMap((p) => (p === "/" ? ["", "/"] : p))
      .join("|")})/?$`,
    "i",
  );
  const isPublicPage = publicPathnameRegex.test(req.nextUrl.pathname);

  if (isPublicPage) {
    return intlMiddleware(req);
  } else {
    return (authMiddleware as any)(req);
  }
}

export const config = {
  matcher: [
    "/",
    "/(en-US|en|it|fr|pt-BR|zh)/:path*",
    "/((?!api|_next/static|_next/image|favicon.ico).*)",
  ],
};

I have two folders to api

|
- [locales]
-api
-routes...
|
- api
-routes...

the one inside locales does not work and I get 405