After B4A upgrade to version 12.20 I got runtime error in my app:
B4X:
java.lang.NoSuchFieldError: No field isService of type Z in class Lanywheresoftware/b4a/BA$SharedProcessBA; or its superclasses (declaration of 'anywheresoftware.b4a.BA$SharedProcessBA' appears in /data/app/ptt.mob-eyJLUFQYDZylQ1TdeGfNFA==/base.apk)
It is caused by ABTO VoIP/SIP library. Currently I'm forced to downgrade to B4A 12.00 - on this version it works Ok. Any advice, please?