Hi Ofi,
could you please tell me which options of the server could interfere with the development with the builder?
Sprry but I can't share a backup copy of the website, I can set a SuperAdmin account for you (as we did) and let you do your work on our installation...moreover I think you could identify the problem faster if you try our experience, I mean, if you work on our server.
Some further info: the website you are checking, is hosted by Siteground (maybe there are problems already known with this farm...?)
We can't work with this tool since days, I hopw we can find a solution.
Is that ok? Could you continue checking the website on our installation?
Regards,
Dave