No, SampleTank does not do that.
But without any details we would only be guessing at what has happened.
As this is primarily a user to user forum, someone-else may chime in [#]. Meanwhile, the best thing to do is
check the FAQs, via here. If they do not resolve the issue, there is a link to the Technical Support form, for some one to one investigation and help. Please let Support have as many details as you can - what steps you took and what the results were. Response time is usually within 2 working days (US (East Coast) Business hours, generally), but in the current circumstances please allow some more time.
[#] But please remember that the same symptoms do not necessarily mean the same problem.