WordPress 5.9 is the gift that keeps on giving...

This time around we've had to patch the drag-and-drop JS component in it to make it compatible.

Upgrade to Simple:Press 6.6.6 to get the fix. The update should be in your WordPress automatic updates page.

We've tested the fix with WP 5.8 and 5.9 but not with prior versions.

We're not expecting issues with versions before WP 5.8 but if you run into any of those, you'll need to update to WP 5.8 or 5.9 for future fixes.