Failed to handle key j: Cannot read property 'substring' of undefined

[adrianmkng]

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

VSCodeVim version: 1.22.1

Stack trace

TypeError: Failed to handle key `j`: Cannot read property 'substring' of undefined
    at C.display (/home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/src/cmd_line/commandLine.ts:223:21)
    at statusBarText (/home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/src/statusBar.ts:205:35)
    at Object.clear (/home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/src/statusBar.ts:105:17)
    at j.updateView (/home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/src/mode/modeHandler.ts:1579:15)
    at j.handleKeyAsAnAction (/home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/src/mode/modeHandler.ts:673:16)
    at runMicrotasks (<anonymous>)
    at process.handledAsAction (internal/process/task_queues.js:93:5)
    at j.text [as handleKeyEvent] (/home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/src/mode/modeHandler.ts:478:11)
    at /home/adrian/.vscode/extensions/vscodevim.vim-1.22.1/extensionBase.ts:372:73