InvalidOperationException error is thrown on cancelling pCache file window in Point Cache Bake Tool.

Steps to repro:
1. Create a new HDRP project.
2. Windows > Visual Effects > Utilities > Point Cache Bake Tool.
3. Bake Mode > Texture > Assign "Elastic_Normal" to Texture.
4. Press Save to pCache file button > Cancel.

Actual Result:
InvalidOperationException error is thrown in the console.

Expected Result:
No Error in the console.

Reproducible in:
2020.2.0a15, 2020.1.0b13, 2020.1.0a23 with Package version: 9.0.0, 8.1.0, 8.0.1.

Note: Please refer attached stack trace.

Environment:
Windows & Mac 10.14.