I ran into a similar problem with this today and the following spring cloud config issue helped me: Issue 1142.
We were using Spring Cloud Config which is not compatible with Spring Boot 2.1.0 as of yet. The Greenwich release train of Spring Cloud will be compatible with Spring Boot 2.1.0.
Your @EnableCircuitBreaker annotation leads me to believe you might also be using a version of Spring Cloud that is not compatible with the 2.1.0 release of Spring Boot.