You are right, its related to SDK update, not B4A update.
This kind of error is new, first error is dated somewhere on end of September.
It's look like crash inside AdMob.
Fatal Exception: java.lang.NullPointerException: uriString
at android.net.Uri$StringUri.<init>(Uri.java:476)
at android.net.Uri$StringUri.<init>(Unknown Source)
at android.net.Uri.parse(Uri.java:438)
at com.google.android.gms.ads.internal.video.a.a(:com.google.android.gms.policy_ads_fdr_dynamite@8005@8005.217755688.217755688:20)
at com.google.android.gms.ads.internal.video.gmsg.f.a(:com.google.android.gms.policy_ads_fdr_dynamite@8005@8005.217755688.217755688:79)
at com.google.android.gms.ads.internal.webview.j.a(:com.google.android.gms.policy_ads_fdr_dynamite@8005@8005.217755688.217755688:31)
at com.google.android.gms.ads.internal.webview.ac.run(Unknown Source:5)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at com.google.android.gms.ads.internal.util.e.dispatchMessage(:com.google.android.gms.policy_ads_fdr_dynamite@8005@8005.217755688.217755688:1)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Fatal Exception: java.lang.NullPointerException: uriString
at android.net.Uri$StringUri.<init>(Uri.java:475)
at android.net.Uri$StringUri.<init>(Uri.java:465)
at android.net.Uri.parse(Uri.java:437)
at com.google.android.gms.ads.internal.video.a.a(:com.google.android.gms.dynamite_adsdynamite@14366051@14.3.66 (040408-213742215):13)
at com.google.android.gms.ads.internal.video.gmsg.f.a(:com.google.android.gms.dynamite_adsdynamite@14366051@14.3.66 (040408-213742215):148)
at com.google.android.gms.ads.internal.webview.j.a(:com.google.android.gms.dynamite_adsdynamite@14366051@14.3.66 (040408-213742215):293)
at com.google.android.gms.ads.internal.webview.ac.run(Unknown Source:4)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at com.google.android.gms.ads.internal.util.e.dispatchMessage(:com.google.android.gms.dynamite_adsdynamite@14366051@14.3.66 (040408-213742215):5)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5469)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)