Hi Jose,
Does the vSZ has enough AP license to manage?
If yes, from the GUI >> Access Points >> Click on the AP >> Scroll down and check for the "Configuration Status".
Does it show "Up-To-date"?
If yes, check the WLAN group you have set for the AP\AP-Group\Zone.
Make sure the SSIDs are added to the WLAN group to be broadcasted on the AP.