The Test might not be available due to any of the following reasons:
- The Test link has expired. This means that the recruiter had set a Test expiry date after which the Test could not be accessed by the Candidates.
- The Test might have a particular scheduled time. However, you might be trying to access it at the time that falls outside the scheduled time.
- The Test owner might have deleted the Test.
To resolve this problem, you can contact the recruiter and request a new test invitation. HackerRank cannot reset the link without explicit communication from the concerned recruiter.