https://github.com/vercel/next.js/discussions/48168#discussioncomment-6973508
someone reported this issue still exists with v13.4.19
are you able to upgrade the version?

ohno Version upgrading makes compile error.

what error?

There was a package issue, but it was resolved right away. Let me check deploy result.

no version update doesnt work

updated to 14.0.4

next build & next start work in locally?

Yes vercel environment only occured.

Buy the way I found solution. middleware.ts behind us...

const middleware = (request: NextRequest) => {
const isMaintenance: boolean = process.env.NEXT_PUBLIC_IS_MAINTENANCE === 'true';
if (isMaintenance) {
return NextResponse.redirect(new URL('/maintenance/', request.url));
} else {
// return NextResponse.next();
}
};

export const config = {
matcher: '/((?!img|maintenance)):path*',
};

export default middleware;

I don't know why upper code makes this issue.

@Ray Thanks reply!