Manage Event: cannot save "Info and Settings" when T&C are set on CiviCRM 5.66

[mlutfy]

Can be reproduced on CiviCRM 5.66 (rc) or dmaster:

• Enable the GDPR extension
• Go to Manage Events, edit an event
• Go to the Terms & Conditions tab, set "Enable terms and Conditions Acceptance" = "no"
• Go to the Info and Settings tab, click save.

You will get an error "Checkbox text is a required field." and "Link Label is a required field."

[mlutfy]

Workaround:

update civicrm_custom_group set style = 'Tab' where name = 'Event_terms_and_conditions' and extends = 'Event';

The fields still appear on the Event Register form, but that might be an undefined behaviour.

[roblog]

I've just experienced this issue as well, the @mlutfy workaround did the trick.