problems with custom connector

[bachik-24]

Airbyte recently stopped supporting such a source as appstore. I took the previous code and corrected the report versions and deployed it to a custom connector. There is a problem there are 4 available streams. If you include all streams in the connection, the connection runs successfully. If you enable one, you get an error: ```
exception caught
java.lang.NullPointerException: Cannot invoke "java.util.Set.contains(Object)" because "fieldsInCatalog" is null

Perhaps someone came across this because I’m already scratching my head