I am experiencing the following error when I try to define a class in typescript. It is meant to create a class handling logging functionality within my app. Here are some more details.

13 | 
14 | abstract class LoggerConfig {
15 |     constructor(public readonly dir: string) { }
16 | }
17 | 
18 | class Logger {
     ^
TypeError: undefined is not an object (near '...class Logger {...')
      at logger/index.ts:18:1

Bun v1.1.16 (macOS arm64)

I cannot for the life of me determine what is causing the source of this error.