After installation of GrandNode theme for v3.9 my web site is broken.
Short prelude: I had previous issues with GrandNode theme for nopCommerce v3.70 which problem we wasn't able to solve. The problem is described in this topic: https://www.nopcommerce.com/boards/t/50789/grandnode-theme-does-not-show-drop-down-product-attribute.aspx
Then I decided to install nopCommerce v3.90 - absolutely fresh installation with no other plugins except NivoSlider.
The theme GrandNode is coming with a plugin.
Firstly I installed the plugin. Then changed the theme. When I open the public site it breaks down.
The short exception form the log is:
Themes\GrandNodeTheme\Views\Shared\_Root.Head.cshtml(13): error CS1061: 'Nop.Core.Domain.StoreInformationSettings' does not contain a definition for 'DisplayMiniProfilerForAdminOnly' and no extension method 'DisplayMiniProfilerForAdminOnly' accepting a first argument of type 'Nop.Core.Domain.StoreInformationSettings' could be found (are you missing a using directive or an assembly reference?)
I found that this property comes in nopCommerce v4.00.
So it seems that the problem is with the deploy of the theme/plugin.
For me parts of the theme/plugin are developed for version 4.00 but wrongly deployed into the plugin/theme for version 3.90