Exception on routeinitialization when using split in onException-Block

The routeinitialization failes with spring-boot or spring, when the route has an onException-Block with an split.

There were no problems in version 2.25.0. The exception occured after the migration from 2.25.0 to 3.7.1.

See https://camel.zulipchat.com/#narrow/stream/257298-camel/topic/NullPointerException.20in.20ErrorHandlerReifier

Reproducer:

https://github.com/razilein/cameltest