Latest Mac Catalina update and PSE

You need the latest apps for Catalina. EVERY macOS update is likely to need updates, it's part of the Joy of Mac. Even though a subscription includes updates, it takes a while so never update too soon.

Have you tried adding your PSE & Lightroom Apps to the control list?

Click System Preferences in the dock and open Security & Privacy

Choose the Privacy tab and then choose Accessibility

Click the lock to unlock (you may be prompted for your Apple system login password)

Then click the plus button

For Elements 2019 navigate to:

Macintosh HD >> Applications >> Adobe Photoshop Elements  2019 >> Support Files

Choose (highlight) Adobe Photoshop Elements Editor and click open (or simply add a check-mark if already listed)

Re-lock and try the editor again.

See image below.