Deploy failed with "No ssrResources.json file" message

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- [X] I have checked to see if my question is addressed in the [FAQ](https://github.com/aws-amplify/amplify-hosting/blob/master/FAQ.md).
- [X] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-hosting/issues?q=is%3Aissue+).
- [X] I have read the guide for [submitting bug reports](https://github.com/aws-amplify/amplify-hosting/blob/master/CONTRIBUTING.md).
- [X] I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.

### App Id

d3uf7no1t1cjcs

### Region

us-east-1

### Amplify Hosting feature

_No response_

### Describe the bug

I have a next.js SSR app hosted on Amplify. The deployment stage is failing with error "Cannot find any generated SSR resources to deploy": [ERROR]: {"code":"7","message":"No ssrResources.json file"}.
I have tried several things to no avail:
- followed [the instructions](https://docs.aws.amazon.com/amplify/latest/userguide/server-side-rendering-amplify.html#deploy-nextjs-app) and everything seems correctly configured for SSR, including the new service role.
- deleted and re-created the Amplify app
- downgraded Next to version 11

### Expected behavior

Amplify correctly detecting SSR app and deploying

### Reproduction steps

1. click the "redeploy this version" button on the build page

### Build Settings

```yaml
frontend:
phases:
preBuild:
commands:
- npm ci
build:
commands:
- npm run build
artifacts:
baseDirectory: .next
files:
- '**/*'
cache:
paths:
- node_modules/**/*
```

### Additional information

_No response_

Start with the provided Amplify build settings and the .next artifact directory, then compare the deployment setup with the linked Next.js SSR deployment guide. Reproduce the failure using the “redeploy this version” action and inspect whether the build produces the expected SSR resources. Done means Amplify detects the Next.js SSR app and completes deployment without the missing ssrResources.json error.

Written by the indexing model from the issue text.