Profile: obineckoo

Hello, iam trying to follow guides , but with no luck

I have nopcommerce 4.4.3 source intalled, After I upload the theme, and try to build/run it, iam just getting error

Return type in method 'SevenSpikes.Nop.Conditions.Areas.Admin.Models.OverridedProductModel.<Clone>$()' on type 'SevenSpikes.Nop.Conditions.Areas.Admin.Models.OverridedProductModel' from assembly 'SevenSpikes.Nop.Conditions, Version=4.4.593.34178, Culture=neutral, PublicKeyToken=null' is not compatible with base type method


thanks for any tips, or is there any way I can update theme to current version ?