To ensure that candidate reports are accessible to anyone who has a link to them, all you need to do is enable this option in your account settings.
In order to do this, go to your account > Account settings
Here, you can turn the ‘Enable candidate reports for guests’ option on, as shown below:
Once you have done this, there is an additional component of the feature. You can either choose to leave guests the ability to modify the report, which is the default (Off), or turn the option on, disabling this ability. This will result in all reports being "read-only" for any guests that access them.
You can also customize how much you want to share in a global report. Whether to show a candidate’s personal data or the details of their answers. You can even choose whether or not to share details relating to specific task types.