Norton for Mac - MalwareX-gen [Trj] -- error (there is no Trojan)

Norton 360 for Mac
1

I just installed a new version of Norton and am receiving the following error when I try and download a PDF that I have 100% certitude is virus and malware free.
The error is:
Norton for Mac - MalwareX-gen [Trj] – error (there is no Trojan)

How do I fix this ?

2

Issue:
Detailed description:
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Error message:
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