Symptoms
Error: In Central Admin when going to K2 Configurtaion Page
Diagnoses
error on page
Could not load file or assembly 'SourceCode.SharePoint.ApplicationPages.Administration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=16a2c5aaaa1b130d' or one of its dependencies. The system cannot find the file specified.
This happened after upgrading from 4.6.7 to 4.6.11 on SharePoint 2010 farm.
Resolution
The issue was resolved after running the K2 blackpearl installer on Central Admin server and select to 'repair' the installation. After the configuration analysis tool completes, run the 'K2 for SharePoint Configuration Wizard'.