When I run DRC on the 8266controller and the V4.21 cell modules on KiCad, it shows multiple courtyard overlap errors

I also sent the designs to FreeDFM and it shows some Missing Soldermask Clearance violations. I don’t have much experience in PCB development. Are these errors important or can I order the PCBs using these files?
I made some changes just on the silkscreen by adding some text. Both the original gerbers by Stuart and the new gerbers show these results.

A very similar question asked here: DIYBMS v4 - #4771 by Dushant_Choudhary