If you have a coding problem, use this function:Unicode::strncpy(textArea1Buffer, (char *) display_buffer, TEXTAREABUFFER_SIZE-1);textArea1Buffer is UTF8 display_buffer is string from ASCII It helped me get rid of the ???? on the display
To resolve this issue:1. Take the main file before changing2. Find all the code that is between the notes USER CODE BEGIN and USER CODE END3. Copy and Paste this code in the same places in the newly created filesthat's it