Uncaught error SyntaxError in markdown-preview-plus webview client

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.58.0 x64
Electron: 9.4.4
OS: Ubuntu 20.04.3
Thrown From: markdown-preview-plus package 4.11.1

Stack Trace

Uncaught error SyntaxError in markdown-preview-plus webview client

At Failed to execute 'querySelectorAll' on 'Element': ':scope > k<n' is not a valid selector.

stack:
Error: Failed to execute 'querySelectorAll' on 'Element': ':scope > k<n' is not a valid selector.
    at Object.P [as resolveElement] (/home/itsme/.atom/packages/markdown-preview-plus/client/main.js:1:7907)
    at Y (/home/itsme/.atom/packages/markdown-preview-plus/client/main.js:1:15381)

Error
    at /packages/markdown-preview-plus/dist/main.js:1:86668)
    at /packages/markdown-preview-plus/dist/main.js:1:90553)
    at CallbacksRegistry.apply (electron/js2c/renderer_init.js:131:792)
    at electron/js2c/renderer_init.js:83:5083
    at electron/js2c/renderer_init.js:83:4323
    at EventEmitter.<anonymous> (electron/js2c/renderer_init.js:127:872)
    at EventEmitter.emit (events.js:223:5)
    at Object.onMessage (electron/js2c/renderer_init.js:115:818)

Commands

     -4:18 core:backspace (input.hidden-input)
     -4:15.9.0 intentions:highlight (input.hidden-input)
     -4:15.7.0 settings-view:open (input.hidden-input)
  4x -3:39 core:backspace (input.hidden-input)
  3x -3:14.1.0 core:undo (input.hidden-input)
     -3:02.3.0 intentions:highlight (input.hidden-input)
     -3:02.0 markdown-preview:toggle (input.hidden-input)
  8x -2:23.6.0 core:backspace (input.hidden-input)
     -1:49.1.0 markdown:indent-list-item (input.hidden-input)
     -1:49.1.0 snippets:next-tab-stop (input.hidden-input)
     -1:49.1.0 snippets:expand (input.hidden-input)
     -1:49.1.0 editor:indent (input.hidden-input)
     -1:45.1.0 core:backspace (input.hidden-input)
     -1:33.2.0 intentions:highlight (input.hidden-input)
     -1:33.1.0 core:move-to-bottom (input.hidden-input)

Non-Core Packages

activate-power-mode 2.7.0 
atom-beautify 0.33.4 
atom-browser 2.1.0 
atom-clock 0.1.18 
atom-file-icons 0.7.1 
atom-ide-base 3.4.0 
atom-ide-code-format 1.0.2 
atom-ide-datatip 0.25.0 
atom-ide-definitions 0.4.2 
atom-ide-hyperclick 1.0.11 
atom-ide-markdown-service 2.1.0 
atom-ide-outline 3.2.0 
atom-ide-signature-help 0.16.0 
atom-music 2.0.3 
atom-react-autocomplete 0.1.10 
atom-runner 2.7.1 
atom-visual-studio-code-ui 2.1.0 
autoclose-html 0.23.0 
autocomplete-paths 2.15.2 
busy-signal 2.0.1 
document-outline 2.1.2 
file-icons 2.1.47 
gcc-make-run 0.2.12 
goto-definition 1.3.4 
highlight-line 0.12.0 
highlight-selected 0.17.0 
intentions 2.1.1 
jupyter-notebook 0.0.10 
language-latex 1.2.0 
language-markdown 0.37.0 
latex 0.50.2 
linter 3.4.0 
linter-gcc2 0.8.8 
linter-ui-default 3.4.1 
markdown-pdf 2.3.3 
markdown-preview-plus 4.11.1 
markdown-scroll-sync 2.1.2 
markdown-table-editor 1.1.3 
minimap 4.40.0 
monokai-flat-ui 4.2.0 
native-ui 0.27.0 
pdf-view 0.73.0 
platformio-ide-terminal 2.10.1 
project-manager 3.3.8 
react-autocomplete 1.2.0 
simplified-chinese-menu 5.3.5 
sync-settings 5.2.15 
trans-en-zh 0.2.5