I've tried these Q&A for days , but still get SSL failed problem , an ugly solution is :
If I launch firefox@sandboxie in KART control panel ( click "Get Premium" button ) ,
then HTTPS connection works fine with KART + firefox + sandboxie ....
But it's not usable for daily , I've downgrade to KART V2 temporary .
I am going to wait a new option to STOP SSL scaning in KART V4 ,
if true then upgrade to KART V4, else stay in KART V2 ....
Thanks for solutions
Best Regard