Why aren't Zoom registration details being saved to Ticket records in Salesforce?

In order to successfully save Zoom registration details to Salesforce as part of the Ticket Temp and Tickets records, you'll need to make sure both objects have these three fields. When defining the API Name, enter only the string proceeding __c. Salesforce automatically adds __c to custom fields:

Ticket Temp object

Field Label: Webinar Join URL
API Name: sbx_WebinarJoinURL__c
Data Type: URL (255)

Field Label: Webinar Meeting Id
API Name: sbx_WebinarMeetingId__c
Data Type: Text (80)

Field Label: Webinar Registrant Id
API Name: sbx_WebinarRegistrantId__c
Data Type: Text (80)

Tickets object

Field Label: Webinar Join URL
API Name: sbx_WebinarJoinURL__c
Data Type: URL (255)

Field Label: Webinar Meeting Id
API Name: sbx_WebinarMeetingId__c
Data Type: Text (80)

Field Label: Webinar Registrant Id
API Name: sbx_WebinarRegistrantId__c
Data Type: Text (80)