Mbed os error message when publisch Mqtt message to AWS when timer expired

Hallo guys .,
I’m new in IOT and I need to send message to AWS IOT when timer expired …
I establish the connection and I can publish message to shadow many times
but when timer started and expired I try to publish message again
I have a problem with error from mbed os

LOG_INFO :Data sending to the cloud
Subscribing/publishing user topic

++ MbedOS Error Info ++
Error Status: 0x80020125 Code: 293 Module: 2
Error Message: CMSIS-RTOS error: Stack overflow
Location: 0x1003F7A9
Error Value: 0x1
Current Thread: rtx_timer Id: 0x3000581C Entry: 0x100400E9 StackSize: 0x300 StackMem: 0x30005C60 SP: 0x30002354
For more info, visit: https://mbed.com/s/error?error=0x80020125&tgt=NU_PFM_M2351_NPSA_NS
– MbedOS Error Info –

so can any one help me to understand why this error appear and what does it mean


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