There is curly braces in Range string representation like {0,999}. And it's being appended ur url in order to query range of builds. However in following code in JenkinsHttpClient, getting IllegalStateException because of this braces:

private URI api(String path)

return uri.resolve("/").resolve(path.replace(" ","%20")); // here

path with {} cannot be resolved. It must be escaped with %7B and %7D