Failed to load API definition - SwaggerUI

Summary

Upon Building my application and accessing http://localhost:8080/swagger-ui/index.html#/ I'm being met with a Failed to load API definition error. While my teammate for the case is running the application from the same branch and his is working perfectly fine.

Is this related to a particular technology/framework? Which one?

This is related to swaggerUI in combination with spring security/security-oauth2.

What have you attempted so far?

I tried to clean up the project by having a new clone from the github repo, removing different dependencies from the build.gradle. But this error doesn't give me much to debug as I don't fully understand it.

What is the intended outcome?

Being able to access Swagger documentation and go forward with handling keycloak.

Example project, logs and screenshots

Errors happen upon running the application and trying to access the localhost URL. . stacktrace.txt