I have already replied on other tp-link question. You can check out here. https://community.tp-link.com/en/home/forum/topic/173188 Most of the fixes work for all solutions related to wifi, wps and...

@JoeEric Hi Joe, sometimes rebooting the wifi router solved the problems. But if you still getting the wifi authentication error on phone then there are more fixes to try. Check out here all 10...