NopCommerce 3.8 - Mailchimp installing plugin error

I am getting an error when I try to install the Mailchimp plugin.

Method not found: 'Nop.Core.IPagedList`1<Nop.Core.Domain.Orders.Order> Nop.Services.Orders.IOrderService.SearchOrders(Int32, Int32, Int32, Int32, Int32, Int32, Int32, System.String, System.Nullable`1<System.DateTime>, System.Nullable`1<System.DateTime>, System.Collections.Generic.List`1<Int32>, System.Collections.Generic.List`1<Int32>, System.Collections.Generic.List`1<Int32>, System.String, System.String, System.String, Int32, Int32)'.

Full Message:
System.MissingMethodException: Method not found: 'Nop.Core.IPagedList`1<Nop.Core.Domain.Orders.Order> Nop.Services.Orders.IOrderService.SearchOrders(Int32, Int32, Int32, Int32, Int32, Int32, Int32, System.String, System.Nullable`1<System.DateTime>, System.Nullable`1<System.DateTime>, System.Collections.Generic.List`1<Int32>, System.Collections.Generic.List`1<Int32>, System.Collections.Generic.List`1<Int32>, System.String, System.String, System.String, Int32, Int32)'.
   at Nop.Plugin.Misc.MailChimp.Services.MailChimpManager.CreateInitiateData()
   at Nop.Plugin.Misc.MailChimp.MailChimpPlugin.Install()
   at Nop.Admin.Controllers.PluginController.Install(FormCollection form)