WPS accept

Does WPS accept work or is it a flaky concept at the best of times? Experience has shown over the years with lots of different kit that it sometimes works and often doesn’t. I’m setting up an older Lenovo laptop with new Windows and can’t get the WPS Accept button working on my hAP ax2. Windows starts doing something but then reports:

Later… while writing this, I got it to work. However, the time it worked, I selected the 2G network and pressed WPS accept. Never been 100% sure which interface to select - 2.4GHz or 5GHz. Before I was selecting the 5GHz interface.