You may very well be harming
You may very well be harming the inverter if you drive with this issue. Most common problem is the inverter coolant pump. However, I just had the same issues and it isn't the pump. (I changed mine out and tested the old, it was/is good.) So I have another problem I have yet to diagnose. If you can, remove the old pump and supply power to it to see if it runs. Conversely you could make sure it is getting power at the connector before even removing the pump.