Face tag -> Search face feature does not work without concrt140.dll file.
XnViewMP distribution package contains all necessary libraries (.dll files) but this one is missing.
Now i manually copy this file to XnViveMP's folder but it would be great if this file is a part of the distribution package.
The problem can also be resolved by installing VC++ libraries (vc_redist.x64.exe can be found in XnViveMP's folder)