Issue with Task Scheduler launching a task

My task was set to Run only when user is logged on and it was failing for me even while I was logged in and starting it manually. The user was set to me already. No password changes, etc.

I solved it by clicking "Change user" and selecting myself again.

I suspect it may have been caused by AD changing the user SID or something to that extent. Perhaps IT was doing some user management in AD, who knows.

On properties,

Check whether radio button is selected for

Run only when user is logged on 

If you selected for the above option then that is the reason why it is failed.

so change the option to

Run whether user is logged on or not

OR

In other case, user might have changed his/her login credentials