When open website in Presence Builder, it shows blank page.
Presnce Builder's editor page blinks for a moment and then disappears.
This behavior is considered to be a software issue with internal ids #PPB-4309 and #PPB-4310, it has already been fixed according to Plesk Release Notes
Install all available microupdates and then Presence Builder will be updated as well:
#/usr/local/psa/admin/sbin/autoinstaller --select-product-id plesk --select-release-current --reinstall-patch --install-component base