If in your code you use something like that:
appodeal.init(appodealListener, { appKey = YourKey, supportedAdTypes = {"banner", "interstitial", "video", "rewardedVideo"}, testMode = false })
You need to raise the “video” word.
Otherwise this causes the code to break down for advertising.
From now on video and intestatal are joined.
https://www.gamedev.net/blogs/entry/2263238-appodeal-plugin-updated-to-sdk-version-20/
Probably Corona will arrange everything, in the meantime it is recommended:
appodeal.init(appodealListener, { appKey = YourKey, supportedAdTypes = {"banner", "interstitial", "rewardedVideo"}, testMode = false })