I noticed an error message coming in sharepoint 2013 powershell after i open it.
Method 'Upgrade' in type 'Microsoft.SharePoint.WorkflowServices.WorkflowServiceA
pplicationProxy' from assembly 'Microsoft.SharePoint.WorkflowServices, Version=....." does not have an implementation.
Then i noticed same is coming all over
1)when i go to manage service application link in the central admin
2)open up any site in browser
Then i tried to install March PU 2013 and August CU 2013 and ran config wizard and it keeps failing with the same above error.
If anyone came across this then any kind of clue will be appreciated. I checked few other similar post over internet but their solution is not working for me.