Missing file reported when try to use as extension

[Permiek]

Description

When trying to use extension, error reported:

Steps to Reproduce

1. Download latest version
2. Unzip into .....\Qlik\Sense\Extensions
3. open dev hub
4. Click on Media Box extension
5. Error (as above)

Expected behavior

No error

Actual behavior

As above

[Please include log files (e.g. Qlik Sense Server logs or Chrome Dev Tools' console output to the issue).]
localhost-1530164927218.log

Environment

Operating system

[x ] Windows
[ ] OSX
[ ] Linux

Qlik Sense

[x ] Desktop
[ ] Enterprise

Browser

[x ] Chrome
[ ] Firefox
[ ] Internet Explorer
[ ] Edge
[ ] Others: XXX

Versions

• Extension version: [Version of the extension]
• Browser: Chrome Version 67.0.3396.99 (Official Build) (64-bit)
• Qlik Sense Desktop: April 2018
• Operating system: Windows 10 Pro 1709 16299.431
• [Other relevant versions]