Method 'Upgrade' in type 'Microsoft.SharePoint.WorkflowServices.WorkflowServiceApplicationProxy'

Method 'Upgrade' in type 'Microsoft.SharePoint.WorkflowServices.WorkflowServiceApplicationProxy' from assembly 'Microsoft.SharePoint.WorkflowServices, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' does not have an implementation.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.TypeLoadException: Method 'Upgrade' in type 'Microsoft.SharePoint.WorkflowServices.WorkflowServiceApplicationProxy' from assembly 'Microsoft.SharePoint.WorkflowServices, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' does not have an implementation.

Recently we have installed service pack-1 for SharePoint server  2013. Everything is going well but development team face the above mentioned issue during custom workflow development. 

After investigating we found that Service Pack-1 unstable the Workflow service. Microsoft release a patch to fix the workflow related issue.

Solution:

The workflow upgrade issue required STS and OServer are at the same version. Following update link provide by Microsoft described the issue and fixing.

https://support.microsoft.com/en-us/kb/2880963

Install the following security patch will fix the reported issue.
FYI: No need to restart the SharePoint server 2013 after install the update.

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