Was this ever fixed? Or maybe I've done something wrong because I don't get the March 15th event as well, altough I've followed the attached guide :(
Following the guide you shouldn't get any kind of bug (I've tested it hundreds of times at this point), but I've been sent two save files with errors that will be fixed shortly. I hope that's the one you are also encountering and you can finally progress in the game! Sorry again for taking so long T_T