I’m currently upgrading an existing application from version 12 to 13. However, I’m encountering an error that says:

"The target environment doesn't support dynamic import() syntax, so it's not possible to use external type 'module' within a script. Did you mean to build an EcmaScript Module ('output.module: true')?"

I’ve tried adding transpilePackages, but it seems that all the external packages and their dependencies need to be added as well.

Is there something that I’ve missed in the configuration?
I have just added reactStrictMode: true, in next.config.js

Note: I am not using App router.