This sounds like it resulted from something outside of Ladybug Tools. Maybe a Windows security update or an update to some antivirus software? In any case, I think you will probably have to interface with your IT, @ehsan.anvary , and I think you might as well get them to reinstall everything like @Asisnath did. Note that there’s an uninstaller that you can use to wipe the slate clean, which I posted at the top of the last release notes:
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