Espressif ESP32-S2 Programming Manual page 1259

Chapter 2. API Reference
ESP_ERR_HTTPD_INVALID_REQ
ESP_ERR_HTTPD_RESULT_TRUNC
ESP_ERR_HTTPD_RESP_HDR
ESP_ERR_HTTPD_RESP_SEND
ESP_ERR_HTTPD_ALLOC_MEM
ESP_ERR_HTTPD_TASK
ESP_ERR_HW_CRYPTO_BASE
ESP_ERR_HW_CRYPTO_DS_HMAC_FAIL
ESP_ERR_HW_CRYPTO_DS_INVALID_KEY
ESP_ERR_HW_CRYPTO_DS_INVALID_DIGEST
ESP_ERR_HW_CRYPTO_DS_INVALID_PADDING
Espressif Systems
(0xb003): Invalid request pointer
(0xb004): Result string truncated
(0xb005): Response header field larger than supported
(0xb006): Error occured while sending response packet
(0xb007): Failed to dynamically allocate memory for resource
(0xb008): Failed to launch server task/thread
(0xc000): Starting number of HW cryptography module error codes
(0xc001): HMAC peripheral problem
(0xc002)
(0xc004)
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(0xc005)
1248 Release v4.4