Error on terminal open: -bash: /nvm.sh: No such file or directory
Check your .bashrc file (usually in the home folder). See answers to this question. There's probably a line reading /nvm.sh somewhere in there -- if so, just delete it.
As Gasper Stukelj awnsered:
There was a line reading /nvm.sh.
The correct path to the file was for me using macOS Mojave:
$ open ~/.bash_profile