How to reproduce

• go to _admin
• open sites list
• select a site and click on configure
• on the skin line, click on the wheel button and choose "Generate a skin"

Actual behavior

• The pop-up is opened but the list of models is empty.
• The model name is displayed for few seconds and then "hidden".
• If I close the pop-up and open it again then the model is available in the list

Expected behavior

• the model is available even the first time.