When rendering a view mode containing breadcrumbs during indexing with search api, following error occurs:
Failed to start the session because headers have already been sent
This should be solved for being able to index full layout builder pages containing breadcrumbs.
We've implemented a temporary fix that removes the breadcrumbs during indexing with a preprocess hook. No proper solution has been found yet.
Closed: won't fix
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Run into this issue and tracked it to EasyBreadcrumbBuilder. It calls Router::matchRequest($request) which applies route enhancers. One of the enhancers is LayoutBuilderTempstoreRouteEnhancer which has private temp store that will try to start session. Fix is to disable it while indexing (see
#3274158-3: RuntimeException while trying to render item →
).
Not sure if this module can do much about it.