Hello Sami424, I will try, anyway I will appreciate a lot if you can upload an example. Thank you so much.
Ok i will upload example, but you have to set your own IDs to the plugin.
So in the example, click on the "Mobile Advert" plugin in the objects list, enter your Android id OR Apple id (no need to have both when testing).
Then check the events, an set the id of the rewarded video being created to your rewarded video id(ID of the rewarded video you created on admobs)
Run and see if button is visible, if it is, the rewarded video loaded correctly
Click the button, if the rewarded video test ad shows, its done, if not, then something is wrong, this always works for me.