FireBeetle ESP8266 and New Blynk app Error when compiling

When compiling a new Blynk app, 

in the Arduino IDE Version 2.03 , board selected DFRobot firebeetle -ESP8266

when compiling standard Blynk example blynk.edgent

I got this error:

fatal error: version.h: No such file or directory

I see in the forums suggesting this could be caused by outdated Arduino Core for ESP8266.

but I was running the latest DFRobot firebeetle-ESP8266 V2.3.3

so instead of firebeetle-ESP8266 I selcted as board a generic ESP8266 module

then I installed the generic library ESP8266 by ESP8266 community V3.02

then I was able to compile correctly

thanks

Fabio