Package is invalid 'CRX_REQUIRED_PROOF_MISSING'

## Bug

Getting the error 'Package is invalid "CRX_REQUIRED_PROOF_MISSING'" when I drag the .crx file into chrome://extensions/

The .crx file was downloaded from here: https://github.com/intuit/ReplayWeb/releases

### Actual Behavior

When I drag the .crx file into chrome://extensions/ I get an error and the extension is not loaded.

### Desired Behavior

When I drag the .crx file into chrome://extensions/, I expect the extension to be loaded and be able to use it

### Steps to Reproduce

Download .crx file from above link.
Open chrome://extensions/
Drag file into middle of the window to upload the extension

Chrome Version 78.0.3904.97 (Official Build) (64-bit)

P.S. Glad to see this went public :) Tell the team I said hi!