Next Auth missing module error in a old project

[schwarzsky]

Any guidance why is this happening?

./node_modules/oauth/index.js:3:0
Module not found: Can't resolve './lib/oauth2'

https://nextjs.org/docs/messages/module-not-found

Import trace for requested module:
./node_modules/next-auth/core/lib/oauth/client-legacy.js
./node_modules/next-auth/core/lib/oauth/authorization-url.js
./node_modules/next-auth/core/routes/signin.js
./node_modules/next-auth/core/routes/index.js
./node_modules/next-auth/core/index.js
./node_modules/next-auth/next/index.js
./node_modules/next-auth/index.js
./lib/session.ts