TestComplete shows this message when you are trying to connect to a mobile device from a project with the Appium-based mobile support enabled and a mobile device connected to your computer locally is detected.
To access mobile devices connected to your local computer, you must have a local Appium server configured and running on your local computer. To learn how to configure such a server, see Set up Appium Server.
As an alternative, you can create tests for applications running on mobile devices connected to your local computer by using the legacy mobile support. To do this, enable the legacy mobile support in your current TestComplete project.
To learn more about types of mobile support implemented in TestComplete, see Testing Mobile Applications.
To disable this message, select the Don't ask again check box. To control whether this message should be displayed, you can also use the Show a notification on detecting physical mobile devices option in the Show Again Flags dialog.
See Also
Testing Mobile Applications
Project Properties - Mobile Devices Options