wdt rest and exception 9 or 28 error

hi

I have wdt rest and exception 9 or 28 error with esp866

my esp exception decoder returns to me:

Decoding stack results
0x40100508: delayMicroseconds(unsigned int) at C:\Users\christ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_wiring.cpp line 210
0x4020174e: loop() at C:\Users\christ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266/FS.h line 52
0x4020b8f2: __yield() at C:\Users\christ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 100
0x4020b9d8: loop_wrapper() at C:\Users\christ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 180

and I dont now what to do !!!!!