Fixing the Bug in Android App, which is coming only in Release mode

Recently, we've made an application, it's working very fine and the problem started arising once after the app is signed and made the release mode application and the problem started arising. Here is the following error kindly want to fix the error ASAP, [login to view URL]: Uncaught exception in Firebase Database runloop (3.0.0). Please report to firebase-database-client@[login to view URL] at [login to view URL]$1$[login to view URL](Unknown Source:6) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL](Native Method) at [login to view URL]$[login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) Caused by: [login to view URL]: No virtual method object()Lorg/json/JSONStringer; in class Lorg/b/e; or its super classes (declaration of 'org.b.e' appears in /data/app/com.nayan.dmacapp-S6_Pb3wuai3-EsSKk7IJPQ==/[login to view URL]) at [login to view URL](Unknown Source:4) at [login to view URL](Unknown Source:59) at [login to view URL](Unknown Source:0) at [login to view URL](Unknown Source:3) at [login to view URL](Unknown Source:40) at [login to view URL](Unknown Source:17) at [login to view URL](Unknown Source:30) at [login to view URL](Unknown Source:1) at [login to view URL](Unknown Source:23) at [login to view URL](Unknown Source:76) at [login to view URL](Unknown Source:31) at [login to view URL](Unknown Source:24) at [login to view URL](Unknown Source:44) at [login to view URL](Unknown Source:100) at [login to view URL](Unknown Source:47) at [login to view URL](Unknown Source:66) at [login to view URL](Unknown Source:23) at [login to view URL]$500(Unknown Source:0) at [login to view URL]$WSClientTubesock$[login to view URL](Unknown Source:6) at [login to view URL]$[login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]$[login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]$[login to view URL]([login to view URL]) at [login to view URL]([login to view URL])