Did you try running sh /scripts/update_ioncube ?
I've compiled the latest 7.3 version today (7.3.19, I was at 7.3.18) and it happened again. I've ran your command and it worked perfectly, thank you.
But, I still have 2 questions:
1. Why CWP don't take care of that while compiling the new php version?
2. Why only part of my wordpress sites (actually only one) shows errors when trying to reach wp-admin?