Business Process Error - Lead Save

Hi, I'm getting the following error on saving the lead. It was working before I registered a plugin on lead, but now I have completely removed the plugin from sdk messages and plugin assemblies,  but im stuck on this error.

[ActivityFeeds.Plugins: ActivityFeeds.Plugins.ActivityClose]
[13958c4f-e451-e811-a95e-000d3a296791: ActivityFeeds.Plugins.ActivityClose: Update of  any Entity]
Entered Microsoft.Dynamics.LeadManagement.Plugins.AddressComputation.Execute(), Correlation Id: c6a59730-9add-47ce-b93b-8109781e295f
Exiting Microsoft.Dynamics.LeadManagement.Plugins.AddressComputation.Execute(), Correlation Id: c6a59730-9add-47ce-b93b-8109781e295f
Entered Microsoft.Dynamics.LeadManagement.Plugins.PreOperationLeadUpdate.Execute(), Correlation Id: c6a59730-9add-47ce-b93b-8109781e295f
Exiting Microsoft.Dynamics.LeadManagement.Plugins.PreOperationLeadUpdate.Execute(), Correlation Id: c6a59730-9add-47ce-b93b-8109781e295f