A task may be showing as 'Attempted' in the Shepper app rather than 'Completed'. The main reason could be as follows:
You were unable to complete the task due to an issue outside of your control
Occasionally Shepherds may be unable to fully complete tasks due to a range of issues (access problems, last-minute cancellations etc). Of course, these issues are outside of the control of both Shepper and the Shepherd, so tasks will be marked as 'Attempted' to show that you have done as much as you possibly could have.
Rest assured, 'Attempted' tasks will still be paid and will appear on your wallet.