Error: notfound key underdouble

[Tranduchieu2002]

Preamble (you can delete this section):

• Are you using a recent build (november 2020 & up) of neovim 0.5?
• If not, rebuild it now before reporting the issue.
• Do you certify having read the readme or are ready for being shamed for not having read the manual?

Description

A clear and concise description of what the bug is. notfound key underdouble in (.../lua/barbar/utils/highlight.lua:152) when using on wsl

To Reproduce

Screenshots If applicable, add screenshots to help explain your problem or to capture error messages.

Informations Neovim version: v0.7.2

[Iron-E]

I can reproduce the issue.

In the meantime, you can upgrade Neovim. We do intend to restore compatibility with this version, however.