Issue upgrading from Vantage 3.0.5
I am having an issue upgrading from Vantage 3.0.5 . There appears to be a compatibility issue with the current theme and the latest version of Wordpress. The login issue - where there is a blank white screen after you enter your details - appears to be specific to the current vantage theme.
Sadly, using the new vantage theme resulted in your whole site content not showing. This is mostly due to the customized layout not being retained.
I can't see that there is a direct upgrade path between the version you are using and the latest version that would allow you to keep your customizations. Is this something you can help with.
I can't update Wordpress and all the plugins without breaking the theme and I can't install the new theme without having to make a lot of cosmetic changes. At the same time, I cant build a new site and then import all of the theme specific data, because there is no export option provided by the theme for that.
I think all of this could have been avoided if the developer had made the changes in a child theme, instead of directly inside the main theme files unfortunately the developer is now gone so I have no way of fixing