The Amazon FreeRTOS code supporting OTA on B-L475E-IOT1A, NUCLEO-H743ZI, P-NUCLEO-WB55, STEVAL-STWINKT1B, X-NUCLEO-BNRG2A1 and STEVAL-STMODLTE is only available under controlled access at the moment.
Please use this link and post a request to be granted access, using the subject line “Amazon Free RTOS TeamSpace: Whitelist Request”.
In case technical support is needed, please either issue a request using this link for STM32-related issues or to AWS using this link for FreeRTOS-related issues.