I have several links to banners to advertise Google dfp, I upload them in a similar way, but half the links give me an error with code 3.
Failed to load ad: 3
All these links work on the iOS version of the application.
In my application, only half of the total number of links work
I found this answer, but it's not suitable for me, because the ads are displayed on the iOS version.
How can I solve this problem?
P.S. I already checked the sizes of banners, they coincide with those that come back to me from the server