I am trying to deploy a ASP.NET Web API to AWS Beanstalk using AWS CodePipeline with both buid and deploy stage and source code is on Github. Now my build stage seems to be working with a success message but the deploy stage is failing with the error:

Deployment completed, but with errors: During an aborted deployment, some instances may have deployed the new application version. To ensure all instances are running the same version, re-deploy the appropriate application version. Failed to deploy application. Unsuccessful command execution on instance id(s) 'i-0aa02c41a8683f9a7'. Aborting the operation. [Instance: i-0aa02c41a8683f9a7 ConfigSet: Infra-WriteRuntimeConfig, Infra-EmbeddedPreBuild, Hook-PreAppDeploy, Infra-EmbeddedPostBuild, Hook-EnactAppDeploy, Hook-PostAppDeploy] Command failed on instance. Return code: 1 Output: null. Error occurred during build: Command hooks failed Deployment Failed: Unexpected Exception

I am not able to understand what the problem is, am I making a mistake in the buildspec.yml file is it something else. This my buildspec file for reference:

version: 0.2

phases:
  install:
    runtime-versions:
      dotnet: 8.0
    commands:
      - echo "Installing .NET Core 8.0"

  pre_build:
    commands:
      - echo "Restoring .NET packages"
      - dotnet restore IndiaShoppingBackend.sln || exit 1

  build:
    commands:
      - echo "Building the .NET application"
      - dotnet build IndiaShoppingBackend.sln --configuration Release || exit 1
      - echo "Publishing the .NET application"
      - dotnet publish IndiaShoppingBackend/IndiaShoppingBackend.csproj --configuration Release --output ./output || exit 1

  post_build:
    commands:
      - echo "Zipping the output files"
      - zip -r output.zip ./output || exit 1
      - echo "Copying files to S3"
      - aws s3 cp output.zip s3://indiashoppingbackend-artifacts-bucket/output.zip || exit 1

artifacts:
  files:
    - output/**
  discard-paths: yes

FYI, I am using RDS for databse hosting and I tested it locally and its working just fine.

Can anyone help me with this? Thanks in advance.

I was trying to deploy backend webapi to aws beanstalk using codepipeline for ci/cd deployment.
the build stage worked but deployment failed