Question IAP stops working after integrating MobileAdsSDK

After adding YandexMobileAds sdk the IAP system stoped working. I call

UnityPurchasing.Initialize(this, builder);

but this method

OnInitialized(IStoreController controller, IExtensionProvider extensions)

is never called. Also there is no error or exception.

OnInitializeFailed

also is not called.
When I remove totally the YandexMobileAds from the project, the IAP still doesn't work. Though before integrating this SDK the IAP worked just fine.
What should I do to make the IAP work as previously?

UPD.
This i saw in XCode

ProductName[6463:2287920] UnityIAP: SKProductRequest::didFailWithError: 0, Error Domain=SKErrorDomain Code=0 "Произошла неизвестная ошибка" UserInfo={NSLocalizedDescription=Произошла неизвестная ошибка, NSUnderlyingError=0x2810e7330 {Error Domain=ASDErrorDomain Code=950 "Unhandled exception" UserInfo={NSLocalizedDescription=Unhandled exception, NSLocalizedFailureReason=An unknown error occurred}}}. Unity Purchasing will retry in 60 seconds

 

Hello, I have the same issue. Did you happen to find a fix for this. Could you please let me know

 

Hello. Yeap, it turned out that it happens because of FacebookSDK. I removed the FacebookSDK and everything starts working fine. In my case YandexMobileAds and FacebookSDK somehow don't allow the Unity IAP system works correct.