I'd expect this to work regardless of the AirWave version for managing IOS APs with templates.
Can you check the following?
Go to Groups -> select the group with the IOS APs -> Basic tab -> Cisco IOS/Catalyst box
Check to see which mode of IOS communication is being attempted
It should be a Telnet or SSH option toggle
Here's a capture:
If it's set to Telnet, toggle to SSH and then "Save and Apply" (followed by a confirm page).
Another test is to login to AirWave CLI, test an SSH connection to the IOS AP. Sometimes there's a prompt for generating an SSHkey that might not be accepting the confirm action.
Once either of the above actions are performed, go to IOS AP's audit tab and force an audit -> this will run a verification check of the Telnet/SSH connection as part of the audit process. (Make sure that the device manage page has the IOS AP in monitor only mode during the this test check).
Caution: When using templates, make sure you have a valid template before putting any devices into Management mode. AirWave assumes that the action of putting an AP into Management mode is a sign-off that the group template is what the admin desires (even if template is blank).