Not able to deploy site because of build.command failed

As im trying to deploy my site I got rejected for several times now.

I hope someone is able to provide me a solution. Please see the error code below.
Already tried with a new environment variable CI false, but stil the same error.

7:32:16 PM: ────────────────────────────────────────────────────────────────
7:32:16 PM: “build.command” failed
7:32:16 PM: ────────────────────────────────────────────────────────────────
7:32:16 PM: ​
7:32:16 PM: Error message
7:32:16 PM: Command failed with exit code 1: npm run build (Search results for '"non-zero exit code: 1"' - Netlify Support Forums)
7:32:16 PM: ​
7:32:16 PM: Error location
7:32:16 PM: In Build command from Netlify app:
7:32:16 PM: npm run build
7:32:16 PM: ​
7:32:16 PM: Resolved config
7:32:16 PM: build:
7:32:16 PM: command: npm run build
7:32:16 PM: commandOrigin: ui
7:32:16 PM: environment:
7:32:16 PM: - CI
7:32:16 PM: - NEXT_PRIVATE_TARGET
7:32:16 PM: publish: /opt/build/repo/.next
7:32:16 PM: publishOrigin: ui
7:32:16 PM: plugins:
7:32:16 PM: - inputs: {}
7:32:16 PM: origin: ui
7:32:16 PM: package: ‘@netlify/plugin-nextjs’
7:32:16 PM: Caching artifacts
7:32:16 PM: Started saving node modules
7:32:16 PM: Finished saving node modules
7:32:16 PM: Started saving build plugins
7:32:16 PM: Finished saving build plugins
7:32:16 PM: Started saving pip cache
7:32:16 PM: Finished saving pip cache
7:32:16 PM: Started saving emacs cask dependencies
7:32:16 PM: Finished saving emacs cask dependencies
7:32:16 PM: Started saving maven dependencies
7:32:16 PM: Finished saving maven dependencies
7:32:16 PM: Started saving boot dependencies
7:32:16 PM: Finished saving boot dependencies
7:32:16 PM: Started saving rust rustup cache
7:32:16 PM: Finished saving rust rustup cache
7:32:16 PM: Started saving go dependencies
7:32:16 PM: Finished saving go dependencies
7:32:17 PM: Build failed due to a user error: Build script returned non-zero exit code: 2
7:32:17 PM: Creating deploy upload records
7:32:17 PM: Failing build: Failed to build site
7:32:17 PM: Failed during stage ‘building site’: Build script returned non-zero exit code: 2 (Search results for '"non-zero exit code: 2"' - Netlify Support Forums)
7:32:18 PM: Finished processing build request in 45.72988237s

Hi @Remofurrer

Unfortunately the portion of the deploy log you have posted does not contain the actual reason for the error. This would have appeared prior to this. Can you please post the entire deploy log.