Solution:
Do a Sitecore upgrade.https://community.sitecore.net/developers/f/5/t/215
http://sitecorefootsteps.blogspot.ch/2015/03/why-not-to-upgrade-to-sitecore-80.html
Server Error in '/' Application.
job in checkstatus
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.InvalidOperationException: job in checkstatus
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. |
Stack Trace:
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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34249