blitzjs app router doesn't support vercel deploy

What is the problem?

after this https://github.com/gengjiawen/sass-template/commit/e3dbfc04fba523213404f4a14845e7631a99e11f

Paste all your error logs here:

⨯ Error: Usage of `getBlitzContext` is supported only in next.js 13.0.0 and above. Please upgrade your next.js version.
    at <unknown> (.next/server/chunks/881.js:77:23128)
    at Generator.next (<anonymous>)
    at <unknown> (.next/server/chunks/881.js:77:20730)
    at new Promise (<anonymous>)
    at ej (.next/server/chunks/881.js:77:20550)
    at eD (.next/server/chunks/881.js:77:22851)
    at <unknown> (.next/server/chunks/881.js:3:4990)
    at Generator.next (<anonymous>)
    at <unknown> (.next/server/chunks/881.js:3:4875)
    at new Promise (<anonymous>) {
  digest: '744844193'
}```


### Paste all relevant code snippets here:

PASTE_HERE (leave the ``` marks)

### What are detailed steps to reproduce this?

1.

### Run `blitz -v` and paste the output here:

System: OS: Linux 6.1 Ubuntu 22.04.5 LTS 22.04.5 LTS (Jammy Jellyfish) CPU: (16) x64 AMD EPYC 7B13 Memory: 35.83 GB / 62.79 GB Shell: 5.1.16 - /bin/bash Binaries: Node: 22.13.1 - ~/.nvm/versions/node/v22.13.1/bin/node Yarn: 1.22.22 - ~/.nvm/versions/node/v22.13.1/bin/yarn npm: 10.9.2 - ~/.nvm/versions/node/v22.13.1/bin/npm npmPackages: @blitzjs/auth: 3.0.1 => 3.0.1 @blitzjs/next: 3.0.1 => 3.0.1 @blitzjs/rpc: 3.0.1 => 3.0.1 @prisma/client: 6.5.0 => 6.5.0 blitz: 3.0.1 => 3.0.1 next: 15.2.2 => 15.2.2 prisma: 6.5.0 => 6.5.0 react: 19.0.0 => 19.0.0 react-dom: 19.0.0 => 19.0.0 typescript: 5 => 5.8.2 ```

Please include below any other applicable logs and screenshots that show your problem:

No response