Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
When I try and access the current awards for any of the scouts in my pack at advancements.scouting.org, expanding the Current Adventures sub menus only reveals a blank space. I cannot see anything recently completed by any scout, nor can I mark anything as completed, approved, etc. I am able to see Past Adventures for all scouts in full. I am also still able to move scouts into dens and perform other tweaks.
My number is (removed by moderator). I am using the Chrome browser.
I am also experiencing this issue, both in my parent role for my son and in my den leader role for my den. I can see scouts, but I cannot do anything with their advancement.
I suspect the issue is you are both Cubmaster and Key 3 Delegate. Since you are already Key 3 by being Cubmaster you should not have the Key 3 Delegate role.
You or another Key 3 should go into the Position Manager tab under Roster in my.scouting.org and remove Key 3 Delegate from your list of positions then wait until the next day to see if this clears up what you see.
Funny, I JUST made myself a key 3 this morning thinking maybe that would solve my issue (it didn’t). I’ll switch myself back and see if it works tomorrow.