Symptoms

K2 app for SharePoint was installed and configured earlier. However, now we receive an error while going to a SharePoint list and accessing K2 application from ribbon
 

Diagnoses

bK2].[Environment].eField] and Environment].eFieldValue] tables were requested from the customer. upon investigation in the FieldValue table i found this wrong entry "https//k2.domain.com/Designer" in one of the environments. From workspace modify the value it for All the environments(Develpment and Production) and the string table.
 

Resolution 

Modified the entries in K2 workspace for All the environments (Develpment and Production) and the string table.