If there is no connection to the controller, TRIK Studio will show an error:
In this case check:
Whether the IP address in TRIK Studio matches the IP address on the controller.
Whether the TRIK controller displays its IP address.
The IP address may not exist if the controller is connected to a Wi-Fi network in Wi-Fi client mode, but the router did not issue it. We recommend that you wait for a little or switch to the "Access Point" mode and back in the Wi-Fi client mode.
It can also happen in Access Point mode. We recommend turning off the controller for a while and then restarting it.