I am trying to apply my production license(LEF file) to another, which is isolated from my network. After applying license it shows blank screen without any error or it shows SERVER_NAME: checksum is invalid. I have clustered environment here.
My be there is some issue with you LEF file.
try to contact support or Qlik Qoncierge Service
They will help you out
That means the License and the Control numbers don't match.
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