Is your enhancement request related to a problem? Please describe.

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For example, I set the logfile to "D:\boo\hlslogDir", it is a directory. And the I met the problem:
AUK@HRQ PV7S8}55LS6C(8T

When I set the logFile setting to null, it worked.
I7FX3GX@GS~D61LXL (}5U4

Describe the solution you'd like

So I think it should has a warning hint on the setting bar, or it should be mentioned at Readme's F&Q