For those of you who are following https://learnk8s.io/spring-boot-kubernetes-guide (from 2022)
When you get the dreaded “Whitelabel Error Page” and you are pulling out your hair, here is your solution:
The stack overflow: https://stackoverflow.com/questions/42330870/spring-boot-unable-to-resolve-freemarker-view (from 2020)
Which points you to https://github.com/spring-projects/spring-boot/issues/15131 (from 2018)
And the answer is:
Rename src/main/resources/templates/index.ftl to src/main/resources/templates/index.ftlh
Keywords: Spring Boot SpringBoot Freemarker Kubernetes spring-boot-starter-freemarker