i am nab at scripting, you can try this 
item_pickup_trig waittill("trigger");  But what i was really wondering is that, in your map in radiant is it misc_model or script_model, it should be script_model as far as i know. That's what can i suggest right now, hope yo...

  Give more information, and any Screenshot if it's possible.

np man, just keep it always on admin mode, but still i dont know what actually does cause this error  because it always happens to me, even if i would format the entire laptop, but anyway as long as the admin mode fixes it we gonna be fine i guess 

Ahhahahaha haha this shit stupid error, it happens to me always, right click on launcher and compability, run as an admin. Idk if it will work for you but with me works always. 

I have never got that error but what i can suggest is that on script placer you can try to create a new map, click it on a "CUSTOM" map, then go and choose your actual map. Then convert it again and see if you do get the error again.

As  @gympie6  said, try to put that file on raw/maps, it might work.