I am trying IronSource Ad network mediation with Facebook bidding. I am trying banner and interstitial ad. But I am getting this error : "Empty waterfall" every time I am trying to load the ads. Please help me out, there are no information available about this online as it's a new thing.
This is an old question and I end up here. Finally, I managed to fix this issue.
In the end, the reason for this issue is that Facebook is not serving ads, and they don't serve ads if the device does not have Facebook installed or base on users' privacy settings on their platform.
In my case, I was getting that error 100% of the time despite having two AD Sources: IronSource itself and Meta.
Despite the issue with Meta, I was expecting getting at least IronSource ads.
Issue I was facing:
606 - Empty waterfallHow I fixed:
Despite the clear message (i.e. Empty waterfall), there's nothing on their platform that allows you to configure a "waterfall". After trying a lot of things, I discovered we need to create "Ad Instances" as follows:


After adding an instance, I could finally get live AD's on my app.
The complete guide can be found here:
https://developers.is.com/ironsource-mobile/android/add-iron-source-instances/
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