ESP32Wifi blynk example : run time failed

[ICDUSW]

dear all,
when i tried the ESP32Wifi example from Blynk, i get this error at run time :

/Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/./queue.c:721 (xQueueGenericSend)- assert failed!
abort() was called at PC 0x4008399b
Guru Meditation Error: Core 1 panic'ed (abort)

Backtrace: 0x40008155:0x3ffcc450 0x40007d16:0x3ffcc470 0x40093c88:0x3ffcc4b0 0x400f382c:0x3ffcc500 0x400ece75:0x3ffcc520 0x400d1d8c:0x3ffcc550 0x400d1d9a:0x3ffcc590 0x400d1e06:0x3ffcc5c0 0x400d1e7f:0x3ffcc5e0 0x400d0ea2:0x3ffcc6e0 0x400d18a3:0x3ffcc710 0x401096ae:0x3ffcc730

CPU halted

Any idea ?
Regards
pm