When having a pseudo field on an entity display you will run into two exceptions.
One happens in the BuilderDataConverter class because there is no definition for an extra field, that can be easily fixed by adjusting an if condition.
The other one happens because inDerivableContextSourceBase::getDerivedContexts class we are not catching exception that can occur if you are using a pseudo field because this plugin ID does not exist:
field:paragraph:accordion_item:extra_field_frontend_editing
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It's likely this issue predates Contrib.social: some issue and comment data are missing.