group API method cannot fetch group names with a slash

Issue Summary

Confluence Cloud permits group names with a slash in them. Ex: "foo/bar". However, when using the "group" API resource, groups cannot be fetched by name when they have a slash. Ex: "https://foo.atlassian.net/wiki/rest/experimental/group/foo/bar". Nor does the method support URL encoded slashes like "foo%2Fbar"

Steps to Reproduce

1. From the admin section, create a group named 'foo/bar"
2. From the browser, navigate to: "https://yourinstance/wiki/rest/experimental/group/foo/bar" or "https://yourinstance/wiki/rest/experimentsl/group/foo%2Fbar"

Expected Results

Successful API response with group info in JSON

Actual Results

400 bad request

The below exception is thrown in the xxxxxxx.log file:

...

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available