I have upgraded once again from 4.1 to 4.1 SP1 before upgrading to 4.2.
When I run the website, I got the following error:
Method 'OpenAccessEnhancedGetPersistenceManager' in type 'ProductSheets.Model.ProductSheetItem' from assembly 'ProductSheets, Version=1.0.4260.18456, Culture=neutral, PublicKeyToken=null' does not have an implementation.
I have attached a screenshot of the error.
I need an answer really quickly