UnityAds can't find part of path??

So, I added unity ads to my game. But, when i test it in the editor, it gives me the error that it cannot find the file “test_unit_800.png”… But I checked the link, and the file was there. I checked the code multiple times, but it does not work…

Anyone knows a solution?

If anyone else has this same problem just delete all the UnityAds folders and re-import. I had the same problem and it looks like it had failed to import everything correctly the first time.