ESP32 Cyd and lvgl

Using Arduino Programming Questions
1

Hello I use an ESP32 and I fiddle with lvgl. Wo this is a great Project
My C++ skills are limited and I got an Error in a function

static void set_needle_line_value(void * obj, int32_t v)
{
    lv_scale_set_line_needle_value(obj, needle_line, 60, v);
}

invalid conversion from 'void*' to 'lv_obj_t*' [-fpermissive]
I have no clue how to solve this.

2

Start by posting a full sketch that illustrates the error and the full error message

3

The good news is it is permissive so it will execute but once you show the code AND the entire error log in code tags (both) we can do better.