Why u make another thread?
I also found on another thread
Yes it is possible to create an NNID on a CFW 3DS/2DS. Unfortunately it doesn't solve your problem... When did you hax your 2DS? Are you using emuNAND or sysNAND with A9LHAX?
Are you on 11.1 and latest Luma files.
I have a feeling that maybe some system files could be from a previous version and when eShop sees that it boots you out.
Not sure when I should create one?