Minimalist not loading, error on start

[sum01]

environment

• vim: Neovim v0.2.2
• vim-airline: vim-airline/vim-airline@6a05b92
• OS: Arch-Linux 4.16.13-1-ARCH
• Have you reproduced with a minimal vimrc: Yes
• What is your airline configuration:

let g:airline_theme = 'minimalist'
let g:airline#extensions#tabline#enabled = 1

if you are using terminal:

• terminal: Konsole v18.04.1
• $TERM variable: xterm-256color
• color configuration (:set t_Co?):

set termguicolors
set background=dark

actual behavior

When Neovim is opened, this error message displays, and my theme seems to not be used.

Error detected while processing function <SNR>19_on_window_changed[15]..<SNR>19_init[17]..airline#switch_theme[14]..airline#load_theme[15]..airline#extensions#load_theme[1]..airline#util#exec_funcrefs[2]..airline#extensions#tablin
e#load_theme:
line    9:
E716: Key not present in Dictionary: visual.airline_a)
E116: Invalid arguments for function get
E15: Invalid expression: get(colors, 'airline_tabtype', a:palette.visual.airline_a)
line   11:
E716: Key not present in Dictionary: insert.airline_a)
E116: Invalid arguments for function get
E15: Invalid expression: get(colors, 'airline_tabmod', a:palette.insert.airline_a)
line   22:
E121: Undefined variable: tabtype
E116: Invalid arguments for function airline#highlighter#exec
line   24:
E121: Undefined variable: tabmod
E116: Invalid arguments for function airline#highlighter#exec
line   31:
E716: Key not present in Dictionary: insert.airline_a)
E116: Invalid arguments for function get
E15: Invalid expression: get(colors, 'airline_tabmod_right', a:palette.insert.airline_a)
line   41:
E121: Undefined variable: tabmod_right
E116: Invalid arguments for function airline#highlighter#exec

expected behavior

To work like it did a day ago.

[ru-wang]

I have the same issue with vim 8.1 on Arch Linux 4.16.13-2
#140 fixes this