Theme Visual Editor - Will Not Display

Anybody have this occur before - it is a first for me, especially when client insists they have not changed anything!!!

No cart upgrades, not setting changes, no random file editing…

The visual editor button is clicked in the Design page, and the home page opens, but no visual editor is displayed.

Any thoughts appreciated. N

In the big tracker you can find the following

In order to resolve the issue for your version, you need to delete all records form the cscart_settings_vendor_values table.

Please try