Is this an old B/W DNA 75 or the newer DNA 75C? Are you getting this message 100% of the time in all modes or just after a puff or two, or only in TC mode? I have noticed with one of my tanks, sometimes when I put it on the initial resistance reading is higher than it should be. If I try to vape it this way, I can only get 1 or 2 puffs then will get that error. If I go into the resistance setting and have the device re-read the resistance, it will pull in the right resistance and then it works perfectly. Not sure why this happens with only this one particular tank (SMOK TF-RTA), when all other tanks and RDA's do not have this issue.
I would suggest measuring the resistance on some other device and comparing that to what the DNA 75 is reading. If it is too high, try manually changing the resistance to what the other device read and see if that works.
If that doesn't work, you can get new raw boards for about $50 and replace the one in your mod.