You need to install the 'helper' before V165
Everything JLR SDD related (feel free to add experiences/help).
Download & unzip 'diagnostic installer helper' from https://topix.landrover.jlrext.com/topix/ui/mylinks Edit - For SDD select the link SDD Manual Software Download. This will download the required files needed to your downloads area in your browser ready for you to install...
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