DOMException caused by Worker

[mayacoda]

A fresh installation of cottontail/next branch caused the following error in Chrome and Safari (did not check Firefox):

Unhandled Promise rejection: Failed to construct 'Worker': Script at 'http://localhost:3000/bb51ef3a0004b3e88dff.worker.js' cannot be accessed from origin 'http://127.0.0.1:3000'. ; Zone: angular ; Task: Promise.then ; Value: DOMException: Failed to construct 'Worker': Script at 'http://localhost:3000/bb51ef3a0004b3e88dff.worker.js' cannot be accessed from origin 'http://127.0.0.1:3000'.(…)