HELTEK WIFI KIT32 crashes using BluetoothSerial library

I tried the example file “SerialToSeriaBT” but the module crashes and reset at the very startup with thi mesage. Any solution ?

ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)

configsip: 0, SPIWP:0xee

clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

mode:DIO, clock div:1

load:0x3fff0018,len:4

load:0x3fff001c,len:928
ho 0 tail 12 room 4
load:0x40078000,len:10080
load:0x40080400,len:5856
entry 0x400806a8
Guru Meditation Error: Core 0 panic’ed (LoadProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x400df7dc PS : 0x00060930 A0 : 0x800dfe7d A1 : 0x3ffd0120
A2 : 0x3ffdea88 A3 : 0x3ffd0198 A4 : 0x00000001 A5 : 0x00000001
A6 : 0x00060b20 A7 : 0x00000000 A8 : 0x00000000 A9 : 0x3ffd0120
A10 : 0x00000003 A11 : 0x00060b23 A12 : 0x00060b20 A13 : 0x3ffd01a0
A14 : 0x000f1400 A15 : 0x3ffdea88 SAR : 0x00000020 EXCCAUSE: 0x0000001c
EXCVADDR: 0x0000002c LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff

ELF file SHA256: 0000000000000000

Backtrace: 0x400df7dc:0x3ffd0120 0x400dfe7a:0x3ffd0170 0x400d6215:0x3ffd0190 0x4008f4d2:0x3ffd01c0

Rebooting…