Symptoms

Version string portion was too short or too long
 

Diagnoses

You get the following error when trying to click on the K2 Application button in the Ribbon in SharePoint. It's a brand new site and happens with any list you create

10702 An error occurred in the SharePointIntegration Service Instance. Version string portion was too short or too long.
0 System.ArgumentException: Version string portion was too short or too long.
at SourceCode.SmartObjects.Services.SharePoint.Integration.Execution.Execute.ManageOAuthToken(ServiceInstance Service)
at SourceCode.SmartObjects.Services.SharePoint.Integration.IntegrationService.Execute(). Additional info: IntegrationService.Execute.
 

Resolution

Please do run the registration wizard if you run into this issue. This will need to be done once you have upgraded to next version of K2 to sync up the environment.