Created attachment 798633 [details]
y2logs

There is appliance (ISO image for Live CD) created in openSUSE Build service.
I boot from it, download YMP file (1-click install file). I open it, but it
fails:

Internal error. Please report a bug report with logs.
Run save_y2logs to get complete logs.
Details: Failed to load Module 'OneClickInstallWidgets' due to: No base product
found
Caller:  /usr/share/YaST2/modules/Product.rb:130:in `FindBaseProducts'

Workaround: remove "dummy-release" package and install "openSUSE-release"
package. After this workaround, I can successfully install via 1-click install