Has anyone seen this deployment error caused by tailwind before?

Help
1

Hello,

Has anyone else received a similar deployment error to this?

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This is the error I am receiving after originally troubleshooting a different Tailwind issue:

“Error: It looks like you’re trying to use tailwindcss directly as a PostCSS plugin. The PostCSS plugin has moved to a separate package, so to continue using Tailwind CSS with PostCSS you’ll need to install @tailwindcss/postcss and update your PostCSS configuration.”

For context, this is what is in my postcss.config.js file and app/layout.tsx file

postcss.config.js

module.exports = {
  plugins: [
    "@tailwindcss/postcss",
    "autoprefixer",
  ],
}

app/layout.tsx

import type React from "react"
import "./globals.css"
import { Montserrat } from "next/font/google"
import { Analytics } from "@vercel/analytics/react"
import { SpeedInsights } from "@vercel/speed-insights/next"
import ClientLayout from "./client-layout"
import { AuthProvider } from "./contexts/AuthContext"
import { IdeaProvider } from "./contexts/IdeaContext"

const montserrat = Montserrat({
  subsets: ["latin"],
  display: "swap",
  variable: "--font-montserrat",
})

export const metadata = {
  generator: "v0.dev",
  icons: {
    icon: "/favicon.ico",
  },
}

export default function RootLayout({ children }: { children: React.ReactNode }) {
  return (
    <html lang="en" className={montserrat.variable}>
      <head>
        <link rel="icon" href="/favicon.ico" sizes="any" />
      </head>
      <body className="font-sans bg-[#f7f7f7]">
        <AuthProvider>
          <IdeaProvider>
            <ClientLayout>
              {children}
              <Analytics />
              <SpeedInsights />
            </ClientLayout>
          </IdeaProvider>
        </AuthProvider>
      </body>
    </html>
  )
}
2

Hi @chasemccaskill15-gma, sorry that you’re facing this issue. Have you tried following the Install Tailwind CSS with Next.js - Tailwind CSS guide?

3

It looks like your codebase is using Tailwind 3 but you have Tailwind 4 installed. You’ll need to either downgrade or go through the migration steps to upgrade

4

Quick update here. I asked v0 this question, and I didn’t understand that Tailwind 4 existed.

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I fed it the Tailwind 4 documentation and asked it to “Update dependencies and configuration for Tailwind CSS v4.” It upgraded the following files:

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However, when I deployed the application, I am now receiving this deployment error:

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5

Ok another quick update. I fed that screenshot to v0 and asked it to fix the code. I fixed the code, but then threw the same deployment error, but with a different file.

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6

Ok final update for the evening :sweat_smile:

I resolved the above errors, but now I am receiving this deployment error that v0 cannot seem to resolve after more than one attempt.

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7

Strange that v0 can’t fix that, I would have expected it to

if you look at the type in the error, it says "on type { id: name, … }[]

This is one of two ways to mark an array in typescript, the other (and my preferred even though it’s less popular) being Array<{ id: name, … }>

So the reason it can’t access that property is that data[0].profiles is an array that can contain MULTIPLE profiles.

{
  // this should work
  role_company: data[0].profiles[0].role_company

  // if profiles is possibly undefined, you may need this
  role_company: data[0].profiles?.[0].role_company
}