vim-powerline shows a weird red color in the left side

Question

I don't know what is wrong with my vim-powerline. A unexpected red bar on the left side of powerline in Macvim, whereas it doesn't appear when I use vim in terminal.

Here is the screenshot:

Both Macvim and vim share the same vimrc file. How can I solve this issue in macvim?

Answer 1

Lokaltog/vim-powerline is outdated and no longer maintained.

https://github.com/powerline/powerline/issues/1745

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I solved my version of this problem by removing vim-powerline, installing powerline via pip install --user powerline-status and adding the following to my .vimrc file:

set rtp+=$HOME/.local/lib/python3.5/site-packages/powerline/bindings/vim/
set laststatus=2