If the aforementioned method didn’t help you setup TP Link extender, you can consider performing TP Link extender setup without WPS. In simple words, you can try another method to configure your wireless extender i.e. Manual method.
Here are the guidelines you need to walk through in order to perform TP Link WiFi extender setup manually:
Note:Your wireless range extender and router should not be placed too close. Otherwise, their WiFi signals might end up clashing.