I am having the same issue ( Data ONTAP API Failed: entry doesn't exist (Error: 15661)). I did re-install the simulator 4 times so far. I tried with both 8.3.1 and 8.3.2 simulators as well.
Any help is appreciated.
I do see the below. When the simulator was installed there is output from the below commands. At this point I did not try to log in. I expanded the disks as per the below link and now there is no output. Has this anything to do with the issue ?