"Pose pack" and "clips" tabs are gone?

Hi! I've tried searching, but I can only find people whose "studio" tab is gone, and none of their fixes worked for me.

When I open my existing pose pack, it looks like this. Just the "Studio" and "warehouse" tabs, but not the "pose pack" or "clips" tabs that I need.

If I click to make a NEW pose pack, it shows up the way I want it to show up with all the tabs. But then I'll have to re-do a lot of work.

How do I get these tabs back? I can't find it in any settings. I've tried to save the pack in different locations and renaming it and stuff, but none of that works.