Both ati tasks errored out at 7100 seconds. "unknown error" is a bit vague.
If the tasks are all erring at the exact same time, then the project has set the max run time to that value. When the tasks hit that value, they self-abort. If that is the case, then only the project can fix it.
"Don't confront me with my failures, I had not forgotten them" - Jackson Browne