Issue when attempting to open a markdown file

[jsatk]

Does this bug happen when you install plugin without vim-polyglot? This appears to be a bug with polyglot code.

Describe the bug:

"../docs/innersource/lifecycle.md" [noeol] 70L, 4030C
Error detected while processing /Users/jesse.atkinson/.local/share/nvim/site/pack/packer/start/vim-polyglot/syntax/common.vim:
line   14:
E121: Undefined variable: main_syntax
Error detected while processing function <SNR>115_MarkdownRefreshSyntax[2]..<SNR>115_MarkdownHighlightSources:
line   31:
E171: Missing :endif
Error detected while processing function <SNR>115_MarkdownRefreshSyntax:
line    2:
E171: Missing :endif
Press ENTER or type command to continue

To Reproduce: Simply open any markdown file.