Error: Handler does not export a fetch() for scheduled worker locally

Hi, I'm a bit confused. I just ran this scheduled worker locally using

wrangler dev

wrangler dev

wrangler dev

wrangler dev and hit the endpoint the curl command from the docs and it worked fine:

curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"

curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"

curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"

curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"

I tried again at a later time and got the following error:

Error: Handler does not export a fetch()

Error: Handler does not export a fetch()

Error: Handler does not export a fetch()

Error: Handler does not export a fetch()

I don't understand why it worked then started failing like this. Any suggestions?