No Video Signal - Mac Mini M1 with Dell UP2414Q in DP 1.2 Mode

The Mac Mini works fine with the monitor when it is not in DP 1.2 (HBR) mode. I.e. Only 30Hz at UHD resolution. When DP 1.2 mode is turned on the monitor shows "No Signal" and it goes into sleep mode. I am using a usb-c to DisplayPort cable: https://www.amazon.ca/gp/product/B01J6DT070.

I would like to hear from anyone who successfully made this combination work and what cable was used.

Thanks.