Hello, RBS1955.
I understand that you are having a power issue with a third-party USB-C hub. I’m glad to help.
I first wanted to ask if peripherals are working as expected when plugged directly into your MacBook Pro. Knowing this will help us isolate from where the error is coming. Also, are you getting this error when the Mac is plugged into power?
Resetting the System Management Control (SMC) of your MacBook Pro would be the first direct troubleshooting step I would recommend. As noted in the article, please be sure to unplug all of your peripherals before resetting the SMC. Restarting the Mac is always a significant troubleshooting step to start off with, but in this case, resetting the SMC accomplishes that as well. We have a real two birds with one stone type situation here.
How to reset the System Management Controller (SMC) on your Mac
You mentioned that you were getting a power error message. Please see if the error message is covered in this article:
If a Mac accessory needs more power or is using too much power
I hope this helps.
Best Regards.