You can try removing the CMOS battery for 15 minutes and then reinserting it. But more than likely it is not compatible with the 3060. For the most compatible RAM go to the Crucial page here.
Optiplex 3060 MT ram upgrade failed. Intel i5-8500 CPU. I purchased Kingston HyperX Fury DDR4 2666Mhz (HX426C16FB2/8) 2x8GB=16GB. The amber codes are 2/7, so a memory error. I tried them one at a time, same error. I restored the original 4GB Micron stick and it starts fine. Why are these DDR4 2666Mhz  sticks not working? Am i supposed to do something in the BIOS? What ram will work? Thx! 
Optiplex 3060 MTower i5-8500 Ram error code amber 2/7