Was told by email support to post here. macOS 10.14.5 and Safari on an iMac. Cannot load backlog, current sprint, or anything else without dozens of console errors. Works fine in Chrome, even works in Safari on another computer.
Some of the errors include:
Failed to load resource: the server responded with a status of 404 ()
Unhandled Promise Rejection: SyntaxError: The string did not match the expected pattern. querySelectorAll batch.js:3687:4398
Failed to load resource: the server responded with a status of 403 ()
Failed to load resource: the server responded with a status of 409 (Conflict)