Hud and Sidebar (as well as the quick links in the bottom corner) display for a split second upon opening the site, but immediately disappear right afterwards, making much of my world's features inaccessible. I have edited personal options to try and get it back, refreshed and reopened the site in multiple browsers (and even on my phone) to no avail.
Chose World GM as my role upon the site's update the other day, and spent a lot of time editing the world yesterday with no problems. Woke up this morning, and suddenly these HUD elements are disappearing on me, making things very difficult for planning.
Have you tried opening World Anvil on a different device? Do you have any antivirus running that might be intercepting Javascript?
Yeah, I believe the other person who had this issue posted their report of this bug did so mere minutes before I did, sorry for the duplicate bug report! It looks like the bug fixed itself though, I'll let you know if it mysteriously reappears, thanks!