The SQUID failed to send and receive MIDI signals.

wo main factors can cause this and there are two possible countermeasures.
1. Is a MIDI or USB cable properly connected?
Connect an external MIDI device and the SQUID properly.

2. You need to set MIDI settings correctly depending on the connected external MIDI device. For the correct setting, check the [MIDI IN] setting and the [MIDI OUT] setting in the GLOBAL menu.
For details, please see the "[MIDI IN] setting" and the "[MIDI OUT] setting" in "GLOBAL settings" in the Operating Instructions.
You can download the Operating Instructions from the AlphaTheta support page https://www.pioneerdj.com/en/support/documents/production/toraiz-squid/.