saguaros I have already provided you the whole site as a backup for use locally. I cannot give you FTP. You have your own copy.
I'm not asking you to control what I customise but I have followed the process by which you support customisation and after upgrading to 3.9 this process breaks.
Edited:
Accordion layout loaded through menu item. Are you saying this is what is broken? I have follwed the Joomla process for creating a new menu item. Surely this gets loaded after the Joomlart template should build the page layout from the layout files?
Also this issue happens as mentioned on another client on an un-customised home page. i.e. default article.
@saguaros The current dev site dev.thissite.co.uk is working by the way. it is joomla 3.8.13. The live site we have looked at is 3.9.*