ISSUE After updating to Drupal 10.5.2 and Webform 6.2.9, the "Source" (YAML) tab is missing from the Webform builder interface, even for admin users with full permissions.
What I’ve tried
- Fully updated Drupal core and Webform module (currently on Webform 6.2.9 / Drupal 10.5.2)
- Cleared all caches and ran all pending database updates (no errors)
- Confirmed that the Webform UI submodule is enabled
- Verified full Webform/admin permissions are granted to my user role
- Tested in both Seven and Claro admin themes
- Checked in incognito/private browsing windows to rule out browser extension conflicts
- Looked for JS errors; only saw
Unchecked runtime.lastError: The message port closed before a response was received., which does not appear to be Drupal-related - Created fresh webforms (no tab appears there either)
Environment:
- Drupal version: 10.5.2
- Webform version: 6.2.9
- PHP version: 8.3
No relevant config or custom code changes between updates.
Has anything changed regarding this feature's UI or does the Source tab still exist in Drupal 10.5.2? If the tab still exists for others, any suggestions on how I can get it back?
