User gets prompted with LicenseManRes.dll could not be found. in Terminal Server session ?

Hi,

I'm running SEP 12.1 client in my Terminal Server 2008 R2 (RDSH) server VM, and intermittently users getting the following popo up:

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Error
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LicenseManRes.dll could not be found.
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OK   
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So whay could be the cause and why is that happening on SEP client ?

So should I update to the latest SEP client 12.1.5 to fix this issue ?