Fable REPL fails to load - certificate expired?

[oshawa-connection]

http://fable.io/repl3/ Uncaught DOMException: Failed to construct 'Worker': Script at 'https://fable.io/repl/js/repl/worker.min.js' cannot be accessed from origin 'http://fable.io'. at ch (http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:198447) at Th (http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:218043) at Ih (http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:218498) at http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:169247 at http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:19692 at e (http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:220396) at Xl.init (http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:19692) at tc (http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:163069) at http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:222894 at http://fable.io/repl3/app.01b4c538d0046b79fd57.js:38:222907

Possibly the certificate expired?