fullstack-typescript | Typescript , React , MobX , Express , GraphQL and TypeORM | GraphQL library

I'm trying to use a similar setup to this repo to try and create a fullstack typescript app using React and Express.

The repo uses tsc-watch like nodemon to keep an eye on the server files, and then webpack-dev-server to host the react static files at port 8085. Meanwhile the server, running on 3000, renders the react app by proxying all static requests to /statics at 8085.

When I clone the repo everything works. However, in my own repo (where I'm trying to learn how to do a similar configuration, the server keeps throwing up this error:

node_modules/@types/webpack-dev-server/index.d.ts

then:

node_modules/http-proxy-middleware/dist/index"' has no exported member 'Config'.

When I go into node_modules, I can see that @types/webpack-dev-server is expecting there to be Config from http-proxy-middleware. In @types/http-proxy-middleware, there is an interface called Config. However, in the normal http-proxy-middleware node module folder, there is not, and this is what is causing the error.

My question is how do I get @types/webpack-dev-server to use @types/http-proxy-middleware, rather than just node_modules/http-proxy-middleware? Or am I missing something else entirely?

I can post code if needed.