Upgrading the Sundial obelisks scattered around the solar system is a big part of the Season of Dawn, Destiny 2's current content season. You'll need to complete bounties from each of the obelisks and Saint-14 to earn the materials you need for the upgrades, but doing so increases your rewards significantly throughout the season.

In order to upgrade the obelisks, you'll need to visit and interact with each one. But many players have reported issues with the obelisk in the EDZ. Walk up to it, and you might find that there's no prompt to interact with the obelisk's control panel, and therefore no way to spend the Polarized Fractaline materials needed for the upgrade. As Bungie has noted, the obelisk is bugged, and it can seem like your progress in the season is stalled if you don't know what to do about it.

Fortunately, there's a workaround. Apparently, the obelisk's issue has to do with the requirement to unlock it in the first place--you need to complete a mission in the EDZ in order to power up the obelisk and make it work. Unlike other obelisks in the solar system, though, the EDZ one isn't just checking if you have completed the requirements; if anybody in your instance hasn't activated it, it won't give anyone the prompt to interact with it.

Bungie suggests repeatedly spawning in at a different transmat location and then returning to the EDZ obelisk, which is located in the EDZ's Gulch section. The idea is that you can try to enter the area over and over, in hopes of finding an instance in which everyone has activated the obelisk. It can be time-consuming, but eventually, it should work.

That method works if you're on PC, although it can be annoying. If you're a console Destiny 2 player, however, you have an easier method. While your character is in orbit, go into your console's Settings menu and adjust the date and time, picking any day in the past. Once that's done, spawn in at the Gulch transmat zone and head to the obelisk. You should now be in an empty instance, having tricked Destiny 2 into thinking you're playing at a different time than everyone else. With nobody around, the obelisk should work.

That's still a bit of a pain, but we've found altering the console's date makes the obelisk work every time. Bungie hasn't said when it'll get a fix together for the obelisk, unfortunately, so be prepared to put in a little extra effort to advance your way through the Season of Dawn's requirements.