How to install dms-cdk module

I'm new to Cloud9 CDK.
How do install the dms-cdk module?

I get error:
Cannot find module '"../lib/dms-stack'
'DmsStack' is declared but its value is never read.

Ran npm install. Still an issue for me.

npm list
dms-cdk@0.1.0 /home/ec2-user/environment/dms-cdk
├── @commitlint/cli@17.0.3
├── @commitlint/config-angular@17.0.3
├── @commitlint/config-conventional@17.0.3
├── @semantic-release/changelog@6.0.1
├── @semantic-release/git@10.0.1
├── @types/jest@27.5.2
├── @types/node@17.0.35
├── @typescript-eslint/eslint-plugin@5.26.0
├── @typescript-eslint/parser@5.26.0
├── aws-cdk-lib@2.93.0
├── aws-cdk@2.30.0
├── cdk-assets@2.93.0
├── constructs@10.1.1
├── eslint-config-airbnb-base@15.0.0
├── eslint-config-prettier@8.5.0
├── eslint-plugin-import@2.26.0
├── eslint-plugin-jest@26.5.3
├── eslint-plugin-prettier@4.2.1
├── eslint@8.18.0
├── husky@8.0.3
├── jest@28.1.0
├── lint-staged@12.4.1
├── npm@9.8.1
├── prettier@2.6.2
├── promptly@3.2.0
├── source-map-support@0.5.21
├── ts-jest@28.0.2
├── ts-node@10.7.0
└── typescript@4.6.4