What is the OCP message on the Beta-2/Beta-4/Beta-8?

Over Current Protection.

The device connected to the module is drawing too much amperage for the module, so the module shut itself down to protect itself. Unplug the module from power to reset the OCP function.

*If the OCP continues to happen, you might want to consider getting a 4RS-1 power expansion module that can work with your BETA unit to increase power capacity.