Account 2484276 has access to the free versions of Marketing Hub, Sales Hub, and Service Hub, so that's why you're unable to create or retrieve enterprise events.
If you do want to test event functionality, though, you can create a test account from your developer account's Testing tab. Test accounts automatically get access to Enterprise subscriptions, so if you use that account's API key, you shouldn't encounter this error.
Account 2484276 has access to the free versions of Marketing Hub, Sales Hub, and Service Hub, so that's why you're unable to create or retrieve enterprise events.
If you do want to test event functionality, though, you can create a test account from your developer account's Testing tab. Test accounts automatically get access to Enterprise subscriptions, so if you use that account's API key, you shouldn't encounter this error.