Unity ad is showing strange error log in logcat

I have attached my One plus 8 with unity project. Unity version 2019.3.10 and Unity ad version 3.4.9

When static interstitial video or rewarded video ad is shown I see strange log in logcat Nothing related in google I could found so thought to ask to experts. 2021-07-15 23:38:41.440 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:2) :: WEBVIEW_ERROR: com.unity3d.services.core.webview.WebView{a0943f VFED..C.. ......I. 0,0-0,0} 2021-07-15 23:38:41.440 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:3) :: WEBVIEW_ERROR: Os0@944810c 2021-07-15 23:38:41.440 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:4) :: WEBVIEW_ERROR: Ns0@cc4ca55 2021-07-15 23:38:41.441 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:2) :: WEBVIEW_ERROR: com.unity3d.services.core.webview.WebView{a0943f VFED..C.. ......I. 0,0-0,0} 2021-07-15 23:38:41.441 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:3) :: WEBVIEW_ERROR: Os0@82e3c6a 2021-07-15 23:38:41.441 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:4) :: WEBVIEW_ERROR: Ns0@614355b 2021-07-15 23:39:03.679 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:2) :: WEBVIEW_ERROR: com.unity3d.services.core.webview.WebView{a0943f VFED..C.. .F...... 0,0-2162,1080 aid=0} 2021-07-15 23:39:03.679 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:3) :: WEBVIEW_ERROR: Os0@72cdaa6 2021-07-15 23:39:03.679 1539 1539 Error UnityAds com.unity3d.services.core.webview.WebViewApp$WebAppClient.onReceivedError() (line:4) :: WEBVIEW_ERROR: Ns0@b1bdce7