@Philbert I upgrade the controller and tested with 2 AP before; but now the controller says "The device is not current compatible with the controller" XD I had to upgrade the AP before upgrade the...

@Philbert Ok thx both. I will try it and check it to upgrade, the SDN to the version 4.0 and the APs at version 5.x I'll try and back again if I have problems. Regards.

Good morning. I have a problem with the Firmware version of my APs. I have 7 APs 2 of them have the Firmware Version 2.3.0 Build 20190731 Rel. 51932 and the other 5 have the Firmware Version 2.21.0...