I had this same issue with my 12S. It was the only repeating issue that I ever experienced. At first the doors would sometimes catch, then they would work fine, then they would not work at all. I had the issue after going to the dealer under warranty on three different occasions.
After my third "fix" at the dealer, I pulled into a gas station and the driver door would not open (It had just worked perfectly 2 minutes ago when I entered it at my house). I reached over to the passenger side to open it, and it would not work either. I was pissed. I'm 6'2" and had to climb out the window while at a gas station.
I was on my phone with Lotus customer service and within an hour they had sent a tow truck for my car. I sent a very detailed email to Lotus customer service and received a phone call late, from someone important. I remember being surprised because it was close to 10pm EST. Lotus sent an engineer from somewhere in the US to my local dealer to address the problem. It has been 5 years now without a single hiccup on either door.
The service manager was not very good at telling me what they had done, but said I will never experience the problem again. They did remove the little poppy up lock things on the inside of the door and put caps in the holes, so that was modified.
I wish I had more info for you, but please realize this was a problem when the vehicles was new. In hindsight, it appeared that my dealer (horrible dealer, don't ever use Auto Europe, they are the reason I will not buy another lotus) was not giving this information to Lotus about the doors failing. When I alerted Lotus to this huge safety issue, they jumped right on it. I'm sure the first time there is a crash and a fire, and the driver can't escape because of faulty door handles, there will be a huge recall.
My Evora was in for warranty issues 8 times. 4 of them were for the doors not opening. Now that I think about it, this car has not had a single problem in 4 years except for the sub-woofer amp failing, which as not really Lotus' fault.