when i changed my init.vim configuration , and source $MYVIMRC ,the error occured
just start nvim and :source $MYVIMRC
please post log below, if you want me to reproduce your issue quickly, including your custom config here will be better.

If you have any screenshots for this issue, please upload here. BTW you can use https://asciinema.org/ for recording video in terminal.
you should not re source vimrc. it is not recommend. and it will break many plugins.
@wsdjeg I think SpaceVim should support vimrc reloading.
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@wsdjeg I think SpaceVim should support vimrc reloading.