Run Samples in WebIDE

Hello together,

Are initialization steps necessary to execute demoapps in the webide?

What I have done:

1. Download the Sample "Upload Collection - Instant Upload" as zip file
2. Import File/Project into WebIde
3. Start "manifest.json"

Then I get some 404 errors that some resources under "/test-resources/sap/m/images" could not be loaded.

What have I got to do to get working demo apps? Or are the demo apps often not executable?

Best Regards
Uwe