One can spot the following piece in mbed tls library sources:

#ifdef _MSC_VER
#include <basetsd.h>
typedef UINT32 uint32_t;
#else
#include <stdint.h>
#endif

This conflicts with Zabbix definition:

#if defined(_WINDOWS)
#	ifndef uint32_t
#		define uint32_t	__int32
#	endif
#endif

...and forces us to #undef uint32_t on Windows before we include mbed tls headers, which makes the further use of uint32_t somewhat ambiguous.

I would like to suggest defining zbx_uint32_t properly (as we define zbx_uint64_t) and use a temporary #define uint32_t zbx_uint32_t while we make continuous effort to eliminate uint32_t from Zabbix code.