Boxster stranded me twice this week.

[kk2002s]

For me those symptoms were due to bad Fuel Pump Relay. No CEL either
Car just shut down. Would crank but not start. After 10-20 mins. would fire right up and I could drive 10-mins and repeat. I did finally get home.

I let car idle in my drive way 20+ mins and finally it shut down. Relay was super hot. I jumped it, fuel pump came on and it started. Plugged relay back in and would not start.

Just another possibility

Good luck