Python/Kivy convert to APK? Need Help

Hello BHW.

I don't know if this question is allowed here or not.

If not, please delete Mods. I apologize.

I already searched for the answer in google and open the links I can and read a lot of articles regarding this problem.

I can't really convert my finished .py and .kivy file to .apk file.

I am following this guide magiduck(dot)github(dot)io/KivyBuildozer/
And my problem is under the
>Create a package for Android> step 3

I can't copy the file from my local machine to the virtual box.

from there, I searched on the internet that:
-I need to DL VBoxGuestAdditions.iso that is compatible with my Virtual Box (DONE)
-Shared clipboard and drag and drop to Bidirectional Settings (DONE)
-tried to make a shared folder in my Local Machine (Windows 8 OS) and locate that inside the Virtual Box (DONE)

but I always bumped to this problem
imgur(dot)com/Z1LGIjA

I tried searching for the problem but get the same results.

I am already worn out, I tried to solve this for 6 straight hours and I think I'm at the dead end.

That is why I think this is my last resort, to ask the experts around here.

And based on my experience, BHW never let me down.

If there is any information I forgot to tell, please let me know.

If you can just please provide me a step by step, guide. That would be an enormous help.

I promise to never procrastinate in my IM journey and love my mother and father wholeheartedly.

Ps. From my previous posts, I can't put URLs so I made little tweaks in here. Please do understand.

I am looking forward to your help.