Hi
Are you using GMS (Guest Management Software) that communicates with the controller? This error message nothing related to wireless connection or anything to do with performance.
Tool like GMS or similar SOAP based application is trying to access a controller feature that isnt avaialble in the current mode of controller deployed.
For example, if GMS is trying to access MSM Team IP whereas the controller is deployed in a single standalone mode. Then such message is displayed.
Make sure you are using latest MSM and GMS software release to avoid such message.
You may refer to an article which i wrote some time ago for a similar message. http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=mmr_kc-0125203