Same for me too.
Actually it is not first time for me. Because ı faced 2-3 times issue that when ı try launch UiPath that not launch. And i always solved by reinstall UiPath with delete everything including nuget packages.
But today for 4-5 hours i tried everything and still UiPath does not launch and this window that you uploaded as image does not appear. In the previous reinstalls the window was appearing.
After this window completed we can’t see any more option, window closing and UiPath has been installed. But the problem that UiPath not launch still continues.