B4R Question uft error

[ShadTech]

i tried to access "pool.ntp.org" from ESP32 through inline c to retrieve date and time
and every thing works will,,,,,
but while uploading with medication has no relation with the code it gives problem the attached in the image
and my inline c code is

#if C
#include "time.h"
#ifdef ESP8266
int chip_id = ESP.getChipId();
#elif defined(ESP32)
int chip_id = ESP.getEfuseMac();
#endif
const char* ntpServer = "pool.ntp.org";
const long  gmtOffset_sec = 3600;
const int   daylightOffset_sec = 3600;

void initime(B4R::Object* o){
    // Initialize the sensor - calibration
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
 
}
void printLocalTime(B4R::Object* o)
{
  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }
 
  char*  t;
 time_t now = time(nullptr);
 t=ctime(&now);
 B4R::B4RString s;
s.wrap(t);
b4r_main::_timelog=&s;
b4r_main::_chpid=chip_id;
}
 
#End If

and solution to return Unicode back???