Unexpected error: Cannot read properties of null (reading 'type')

[lizhiming1986]

Description

An unexpected error occurred in the renderer process.

Stack Trace

TypeError: Cannot read properties of null (reading 'type')
    at file:///E:/Software/marktext-1.0beta-win64/resources/app.asar/dist/electron/webpack:/marktext/src/muya/lib/contentState/paragraphCtrl.js:23:36
    at Array.filter (<anonymous>)
    at Rs.getTOC [as selectionChange] (file:///E:/Software/marktext-1.0beta-win64/resources/app.asar/dist/electron/webpack:/marktext/src/muya/lib/contentState/paragraphCtrl.js:21:23)
    at Ws.<anonymous> (file:///E:/Software/marktext-1.0beta-win64/resources/app.asar/dist/electron/webpack:/marktext/src/muya/lib/index.js:111:22)
    at file:///E:/Software/marktext-1.0beta-win64/resources/app.asar/dist/electron/webpack:/marktext/src/muya/lib/eventHandler/keyboard.js:72:7

Version

MarkText: v0.17.1 (00f5061f)
Operating system: Windows_NT x64 10.0.19045 (win32)