Marketing Cloud Next Form Handler Not Processing Submissions After SDO Reactivation
After my Salesforce SDO expired, the environment was later reactivated. Most of the configuration was still available, but after some time I noticed that my form handler stopped working. The form was still visible on the page, but submissions were no longer being processed.
Upon investigation, I discovered that the JavaScript library responsible for sending form data to the Salesforce instance was missing.
Root Cause
When the SDO was reactivated, the JavaScript resource generated for the form handler was no longer available.
Without this library, the form could not submit data to Salesforce, even though the form handler configuration itself was still present in the environment.
Solution
Simply republishing the form handler did not resolve the issue.
The problem was fixed only after creating a new form handler and publishing it. This action triggered Salesforce to regenerate and load the missing JavaScript library.
An important detail is that all form handlers share the same library. This means you do not need to recreate your existing form handlers. Instead, you can create a temporary (dummy) form handler and publish it to restore the missing library.
Key Takeaway
After an SDO expiration or environment reactivation, some generated resources—such as the JavaScript library used by form handlers—may not be restored automatically.
If your Marketing Cloud Next form handler stops processing submissions, check whether the required library is loading. If it is missing, creating and publishing a new (even dummy) form handler can quickly resolve the issue.
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