As per Log file, the reload task was completed but distribution was failed.
As you said, you have section access, so please reload the task with out section access (distribute to only developers only) and verify any problem with out section access.
Are you distributing to server cluster or folder ?
Is service account added to your section table ?
Is any reduce on the document ?
If the document has section access, have you added the account running the QlikView Distribution Service (QDS) as an admin user in your section access table.
The reload task opens the document in the security context of the QDS service and needs permissions in section access so all data can be loaded.
Apologies for updating late!! The issue got resolved after increasing the RAM of the server. The overall instance type was upgraded. The main issue was that the system was not having enough RAM to open the document (during reload). We had to increase the RAM, without any other go.