The Quest Map and Navigation System has just been marked as compatible for 4.15 as there is no changes required for the 4.14 build to work with 4.15. There does appear to be some odd lighting results in 4.15, but it does not actually stop the system from working (seems to be something in the level, not Quest Map itself). An updated build for 4.15 will be submitted to Epic sometime next week, but anyone wishing to start working with the system in 4.15 can go ahead with it now. Thanks for the continued support.