Ater we’ve started using GraphQL in AdminUI (to display subitems) there is an unwanted consequence - adding a new Content Type and creating a Content Item of that type breaks AdminUI (subitems do not load) until the GraphQL schema & cache are regenerated.

That means that adding a new Content Type can no longer be performed by a site admin, but needs to be performed by a server admin (best during maintenence, to avoid clearing the cache in production when server is live).

Steps to reproduce:

1. Login as admin
2. Go to Admin -> Content Types
3. Create a new Content Type in "Content" group, with "ezstring" fieldtype
4. Go to Content -> Content Structure
5. Create a new item of created Content Type under root
6. Go to root node

Expected:

Subitems are loaded correctly, including the new item

Actual:

Subitems do not load, instead the error notification is shown: " Cannot load location ".

Error from logs:

[2019-09-20 08:40:21] app.CRITICAL: [GraphQL] GraphQL\Error\InvariantViolation: Type loader is expected to return valid type "Folder3Content", but it returned null[0] (caught throwable) at /Users/mareknocon/Desktop/Sites/v3/vendor/webonyx/graphql-php/src/Type/Schema.php line 338. {"throwable":"[object] (GraphQL\\Error\\InvariantViolation(code: 0): Type loader is expected to return valid type \"Folder3Content\", but it returned null at /Users/mareknocon/Desktop/Sites/v3/vendor/webonyx/graphql-php/src/Type/Schema.php:338)"} []

Note

Subitems work correctly after GraphQL schema and cache are regenerated.