Uncaught TypeError: Cannot read property 'element' of undefined

[Enter steps to reproduce:]

1. ...
2. ...

**Atom**: 1.49.0 x64
**Electron**: 5.0.13
**OS**: Ubuntu 20.04.1
**Thrown From**: [tree-view-autoadjust](https://github.com/aviatesk/atom-tree-view-autoadjust) package 3.0.0

### Stack Trace

Uncaught TypeError: Cannot read property 'element' of undefined

```
At /home/ihor/.atom/packages/tree-view-autoadjust/lib/tree-view-autoadjust.js:29

TypeError: Cannot read property 'element' of undefined
at /packages/tree-view-autoadjust/lib/tree-view-autoadjust.js:29:53
```

### Commands

```
```

### Non-Core Packages

```
atom-beautify 0.33.4
atom-clock 0.1.18
atom-file-icons 0.7.1
atom-material-syntax 1.0.8
atom-material-ui 2.1.3
atom-pug 0.2.0
atom-yii2 0.4.0
drunken-php 0.2.4
fonts 3.12.0
highlight-colors 0.9.0
smart-indent 0.1.0
tree-view-autoadjust 3.0.0
```

Start with lib/tree-view-autoadjust.js at line 29, where the stack trace reports the TypeError. The issue provides no reproduction steps, so first reproduce the error in Atom 1.49.0 on Ubuntu 20.04.1 and inspect the surrounding tree-view handling. Done means the reported uncaught TypeError no longer occurs in the reproduced case.

Written by the indexing model from the issue text.