If you were previously running a QlikView environment without a Publisher license and have now swapped to an SLK which includes a Distribution Service/Publisher license, all document reload tasks will be cleared.
The same applies to moving a QlikView environment from a non-Publisher to a Publisher legacy serial number.
All existing document tasks are discarded when a Publisher is enabled.
Before activating the SLK:
Verify if you have a licensed publisher
In the QlikView Management Console, go to System, then switch to Licenses and verify if you have a Publisher listed and licensed.
Alternatively, review the System and Setup tab to see if you have a Distribution Service listed.
Document your existing tasks, so they can be recreated.
The problem is that after applying SLK and all the reload tasks disappeared, I am not allowed to create any reload tasks. And also I am not allowed to assigned any licenses!