Runtime Error in Admob Monetization System (java.lang.Long cannot be converted to java.lang.String)

I’m experiencing a critical error when using the Admob monetization system in Niotron.

Even though I’ve configured the Admob blocks correctly, the app still displays errors. The Banner component is the one I noticed the problem with. This is really annoying. I hope it gets resolved. I’ve tried several different solutions, even thinking it was a bug in something else related to my app, but the error only started after I configured the ad blocks.