Steps:

1. Create landing page.
2. Add Code block.
3. Open Settings, fill Content field and go to Scheduler tab.
4. In Reveal select Set date and leave it as a default.
5. In Hide select Set date and choose future date.
6. Submit.

Actual result:
Page builder is broken, see attached screen, to see, what console shows.

Expected result:
Selected settings are added to block.