On Windows, the software may show the message "A Logic device was found, but there was a problem connecting to it. Another application may be using it. Please let us know if the issue persists."
This message is shown when the OS denies access to the device. In rare cases, this message could be shown from a false positive. If the software still connects after closing the warning, you can continue normally.
This situation typically happens for two reasons. First, another instance of Logic is running and has already taken exclusive control of the device.
Second, the software does not have permissions to access the device. This is extremely rare, even in the presence of enterprise permission environments. Try running the software as the administrator to see if that works.
Finally, this message can also be shown if there is a more serious USB issue. If this message is shown at the same time as the message "Please unplug, and then reconnect your device," it likely indicates a problem with either the USB cable or the USB host controller.