safari can't access asset store "no secure connection"

Hi!

For a few days now I have not been able to purchase anything from the asset store, when I press the checkout button followed by the purchase button safari i launched and the rotating indicator appear withe the text "preparing g your asset store payment" but then I get an error that safari where not able to make an secure connection to unity.pay.com.

This is the first time this happens I and have been buying assets from the asset store for years. I tried to restart the computer and did also try another wifi. But it still not working.

I am running unity 5.3.1.f1 Personal on a mac mini late 2012 with yosemite.

the error says (translated from swedish, see image ): "Safari cannot open the web site Safari could not open http:// …huge url … because safari cannot establish a secure connection to the server pay.unity.com"

Does anyone know what is wrong? :,(