Plugin won’t configure KDevlop for you, you should configure it yourself. First try if it builds with those errors, VS also have problem as it is not fully compatible with UBT and UHT hackish macros, it should build anyway, if it not that means it really problem in your code (i hope you set up KDevlop to use UBT). Try set paths correctly in project settings, if nothing helps then either ignore or disable this feature.