Mystery `NoSuchElementException`

NoSuchElementException
    at FiberRuntime.None (/Users/davidgolightly/dev/masterclass/cortex/node_modules/effect/src/internal/fiberRuntime.ts:1066:22)
    at /Users/davidgolightly/dev/masterclass/cortex/node_modules/effect/src/internal/fiberRuntime.ts:1343:53
    at AsyncLocalStorage.run (node:async_hooks:346:14)
    at AsyncLocalStorageContextManager.with (/Users/davidgolightly/dev/masterclass/cortex/node_modules/@opentelemetry/context-async-hooks/src/AsyncLocalStorageContextManager.ts:40:36)
    at ContextAPI.with (/Users/davidgolightly/dev/masterclass/cortex/node_modules/@opentelemetry/api/src/api/context.ts:77:42)
    at Object.context (/Users/davidgolightly/dev/masterclass/cortex/node_modules/@effect/opentelemetry/src/internal/tracer.ts:154:34)
    at FiberRuntime.runLoop (/Users/davidgolightly/dev/masterclass/cortex/node_modules/effect/src/internal/fiberRuntime.ts:1333:28)
    at FiberRuntime.evaluateEffect (/Users/davidgolightly/dev/masterclass/cortex/node_modules/effect/src/internal/fiberRuntime.ts:893:27)
    at FiberRuntime.evaluateMessageWhileSuspended (/Users/davidgolightly/dev/masterclass/cortex/node_modules/effect/src/internal/fiberRuntime.ts:861:14)
    at FiberRuntime.drainQueueOnCurrentThread (/Users/davidgolightly/dev/masterclass/cortex/node_modules/effect/src/internal/fiberRuntime.ts:623:18) {
  _tag: 'NoSuchElementException'
}