при нажатии Download в хроме ничего не происходит.
в логах пишет:
Mixed Content: The site at 'https://webix.com/' was loaded over a secure connection, but the file at 'https://webix.com/skin-builder/data/7b5b5c37.zip' was redirected through an insecure connection. This file should be served over HTTPS. This download has been blocked. See https://blog.chromium.org/2020/02/protecting-users-from-insecure.html for more details.