when I first install just dance 2018 ,it install success,but I can't play it.I've got the same error with few games also. Other install OK.
replace the boot and licence delete Nintendo folder, still get the error.Try replacing your boot & licence file on your sd card overwrite them with a new one I had the same issue, doing this fixed it somehow installing nsp corrupts the files sometimes either the boot or licence file but it worked. Or it might be the Nintendo folder I replaced all three and it fixed the problem.
copy your files on to your pc, format your card again exfat and put them back on and try that. It certainly worked for me I must admit I did format my card as well.replace the boot and licence delete Nintendo folder, still get the error.
I have fixed it,change a computer download from the same source.I've also had issues but were fixed by downloading the nsp from a different source.
I have figured out the fix for 7.0.1 Kosmos 11.11.11, use no spaces in the NSP and no more then 9/10 digits and the path file cannot be too long